Front axle actuator problem chevy. 0 out of 5 stars Problem solved.

about 4 months and when I first got it it was making a whining/grinding noise but more of a whining noise from the front end but it only did it every once in a great while and all you had to do to get it to quit was stop at a stop sign or hit the 4wd button and shut it back off and the noise would go away I have a 2002 4. silverado 4wd wiring diagram front axle actuator is not receiving activation signal - Cars & Trucks question. Subject: Slow or no Engagement of Front Axle when 4WD is selected (Replace Front Axle Actuator) Models: 1988-97 Chevrolet and GMC K Models excluding 1988-93 Models over 8500 # XXXXX This bulletin is being revised to add information to the Service Procedure, add a Shop for the best Four Wheel Drive Actuator for your 1995 Chevrolet K1500 Pickup 4WD, and you can place your order online and pick up for free at your local O'R. 42. I was on a trail, and the wires got ripped out of my Hello. Yukon XL, Suburban. When i select 4 high or 4 low the transfer case will engage and turn the front driveshaft but the front axle will not engage. Install the actuator motor and tighten until the shoulder of the Save yourself times and money by replacing 4WD Axle Actuator Housing on your GMC Envoy yourself. Step by step instructions on how to replace the front 4x4 actuator on your '99-'12 GM trucks. ~FH . It's the same part and process on these Tahoes from '95 to '99. 1995 Chevrolet K1500 Pickup 4WD - Four Wheel Drive Actuator Search Results. Drive Ratio 3. Perfect for maintenance and care. 1997 k2500 4X4 Issues. Joined I'm not a gear head but have been driving GM 4x4's with the silly incarnations of the Front Axle Actuator since 92. If front driveshaft is turning, the t-case is not in 4 wheel drive. The thick undercoating is tough to work around. 2006 chevy, lbz, Ls, black, ext cab, long bed, 4x4, Next remove the front axle actuator and once again have someone try and put it into 4wd using safety precautions once again. Charles lachapelle. Come join the discussion about Disconnect the actuator's electrical connection at the front axle housing. Symptoms - 4low engages low speed tranfer case as it should, but it light still blinks and does not engage front axle Solution tried - Replaced thermal front axle actuator with new motorized version. I4/I5 Engine & Drivetrain. Put the actuator back in the diff with the actuator activated as if it was in 4HI. Buy a 2008 Chevrolet Silverado 2500 HD 4WD Actuator at discount prices. My truck is a 1999 nbs k2500 A missing actuator leaves it in 2WD mode. All; Parts; Air & Fuel Delivery . Part Number: CWA-68312884AA. However, in thier fix-it book of thiers it states to unplug the TCCM and see if it resets itself, which it did. to/ie/1AFWA00004This video shows you how to install a four wheel drive actuator on your 200 How to install replace front axle actuator 2007-2013 chevy silverado. Drivetrain - Slow Or No Engagement of Front Axle Subject: Slow or no Engagement of Front Axle when 4WD is selected (Replace Front Axle Actuator) Models: 1988-97 Chevrolet and GMC K Models excluding 1988-93 Models over 8500 # XXXXX. Engine: 4 Cyl 1. I have been trying to fix the 4wd on my 89 chevy 1500 pickup. They said that the front actuator is probably ok and that the TCCM is sending bad signals. GM Front Differential Actuator 4WD 8. Filter By Brands In this video, we're going to show you how to replace the four-wheel-drive front axle shift actuator on this '96 Chevy Tahoe. Your Service 4WD light comes on the dash and the truck does not go into 4WD. Any ideas as what the problem could be? Current: 2011 Denali HD LML Duramax RDT EFI Live by Kory Willis, PPEI Transmission Tuning, Flo I'm looking at the passenger side front wheel. Filter By Brands If you're having problems on your GM truck, the dash switch says it's going into 4-wheel drive, but the front wheels aren't getting traction or aren't spinning, then it's probably your axle actuator. I have a new one. SYMPTOMS: NO FRONT DRIVE AXLE ENGAGEMENT WHEN SHIFTED INTO 4X4. The front axle actuator valve is driving me nuts as far as location still. Vehicle. I was able to install the newer actuator and assumed all was well. , faulty transfer case module or actuator how i built a cheap and easy front axle actuator for my 1999 chevy Silverado new body style! But I still have no 4x4, could the problem be in the front axle why would the actuator work but still no 4x4? Thanks . Gear Shift Control ; Actuator. C is the 12V+ keyed on power source to the front axle actuator that powers it. Before I do as recommended by many posts online and pull the actuator motor to check it and the shifter fork, etc. Front axle actuator 2014 700 I would like to know if there is a test for the front axle actuator for my 89 chev 2500, 6 bolt. The 1997 dif read more Buy Now!New Four Wheel Drive Actuator from 1AAuto. Front wheels off of the ground I could spin the front drive shaft with the truck in 4 HI and the right front wheel would spin and the left front barely spun at all. Controls and operates your vehicle's four-wheel drive This GM Genuine Part is designed, engineered, and tested to rigorous standards and is This is an explanation for those who have problems with the 4WD actuator in the front differential, and need a quick fix. Tahoe, Yukon, Escalade. Chevy / GMC Duramax 06-07 LBZ & LLY Forums. Chevy C/K Truck Forum. I have a 1996 Suburban 2500 4wd. Thread starter holytornado84; Start date Feb 21, 2013; Switch it over to 4hi and the actuator and transfer case whirring sounds are present and the indicator light switches to 4hi and stays lit up solid. That's why you only hear its motor whining in the How to install replace front axle actuator 2007-2013 chevy silverado Actuator silverado chevy front gmc axle sierra replace 2007 install C0379 front axle actuator 4x4 fixed!!!!! 2004 chevy avalanche. The front axle engagement actuator contains the following circuits: A Run/Crank Ignition 1 Voltage circuit, a Four-Wheel Drive Wheel Lock Indicator About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Chevy Truck Tech Forums. You can disconnect the connector, remove the actuator, and quickly put in the Direct replacement - this 4WD axle actuator directly replaces the original equipment part on specific vehicle years, makes and models ; Effective fix - installation addresses inoperative four-wheel drive caused by failed original actuator. "no" apply brakes bring to a stop engage low range does low range work Actuator 4x4 front axle gmActuator drivers chevy side ron tech Trailvoy showthread forums actuator trailblazer gmc chevy envoy 4x4 when2015 4wd actuator problem. 7L. The front axle engagement actuator consists of a permanent magnetic motor, a worm gear-controlled plunger, a front axle switch, and an electronic control circuit within the actuator assembly. A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. I put in a 1997 front differential with electric actuator. Check the harness to the actuator and make sure that it is connected to the actuator. If the front driveshaft turns, but the front wheels don't turn, you have a front axle actuator problem. 1999 Chevrolet Silverado 1500 - Four Wheel Drive Actuator Search Results. Actuator link https://amzn. 0L, 6 Cyl 2. com . If either circuit is open, grounded, or shorted to voltage you will get that code. And the last is the front axle actuator. The problem I have is the service 4wd light come on, and I cant unlock the front without shutting the truck off, and turning it back on to reset it. Here is the wiring Newly installed mode actuator not working. Sorry in advance if this is a repeat thread, but we are -black/white wire is Axle switch signal from transfercase control module-L/BU wire (can't remember color code) Axle actuator control from control module-Brown wire is Power wire - 4WD 15amp fuse-Black wire is ground picture isnt great and hard to determine if or what you can do to bypass My 4x4 wont engage into 4wd, changed the transfer case motor, it works , but the actuator on the front axle is not getting any power to it, any suggestions why the shift transfer case motor is working and the axle actuator is Not, and what should I check for? My Vehicle is a chevy Colorado 2004. Any of these symptoms means that your actuator is faulty and it should be checked immediately. If you're having problems on your GM truck, the dash switch says it's going into 4-wheel drive, but the front wheels aren't getting Shop our 4wd actuator harness upgrade for Chevrolet Blazer, GMC Yukon and Chevrolet/GMC Suburban 1992-99. Vette servo, Aeroforce Interceptor, 06 front, Efans, LED rear light, Airaid MIT, Weathertech Unplug the front axle actuator and see if the fuse still blows, very often the actuator or the wiring will short out and cause your problem. Actuator chevy front differential axle 1995 4wd truck gmc 1996 1988 suburban tahoe 1992 additional 1autoshop 1500 4x4 1994 1994 chevy k1500 front passenger side axle shaft/cv axle play 1999-2013 silverado 4wd front axle differential actuator. Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum. The front axle actuator, wiring harness, or control module Took the actuator out and hit the 4 HI button and the actuator extended all the way out. I put 4 four wheels up on jack stands today, and verified that the front drive shaft is moving as it should when 4 W/D is engaged however the wheels are not. 38 out of 5 stars. 3 s-10 with push button 4x4. I could diagnose and fix it, but I am going to take a different approach on this repair and make it permanent! In this article I will show you how to take the front differential out, disassemble it, and permanently engage the actuator in the front 2003 Tahoe front axle won't engage. That being said, the engine needs to be compatible and should have the ability to engage the front wheels. WITH 5 WAY FEMALE CONNECTOR. 3 base model and i can't get my front differential engaged. If the wheel does spin, reach under the truck and try spinning the front driveshaft. 95 Availability: In stock. 5L TD :sfa: The 4WD fuse powers in the dash fusebox the front axle actuator, you may be hearing the encoder motor shift the transfer case but it is not in 4WD till the axle actuator engages the front axle. Four Wheel Drive Problem - Maybe. My initial searches tell me that the front diff is pretty stoutso I shouldn't have broken it. Same style connector, and the side looks the same. Alternatively, you can switch the vehicle into the 2WD mode to disengage the front hub. The shop said that the module under the drivers seat MAY need replacing but One of the most common problems with lowered suspensions is that the vehicle can more easily hit the road when it bounces. Disengagement issues may stem from problems with the actuator or vacuum lines that control the front axle’s engagement. Fits trucks equipped with a thermal front axle actuator using a two round pin connector. The sensor data helps the control module make informed decisions about engaging or disengaging the front axle. Parts like . The replacement part was a cheap part from Amazon although it is working. Chevy GMC 92-99 Required Quantity: (1) $194. The actuator should move, it's a liniar motor. Mind you, this is a Models: 2007-2013 Chevrolet Silverado, Suburban, Tahoe, Avalanche 2007-2013 GMC Sierra, Yukon 2008-2013 Chevrolet Tahoe Hybrid If the above listed conditions are experienced and published diagnostics do not lead to resolution then inspect the front axle actuator connector for signs of moisture intrusion. Okay I have a 1997 Chevy k 1500 5. Reviewed in the United States on December 22, 2023. My problem is that when i push the button on the dash to engage the four wheel drive, both drive shafts are turning but the front wheels are not. Going this far Well if that is the case, you need to address the switch operation and the transfer case. INSTALL THE SPACER FROM THE WIRING KIT INTO THE AXLE TUBE WITH THE FLAT SIDE SEATED AGAINST THE SHIFT FORK. The actuator should extend and retract as you switch between 2wd and 4wd. Chevrolet Colorado and GMC Canyon. Locate the axle actuator 5-pin connector on the service actuator wiring harness and Chevy front axle actuator wiring diagram. A Related Problem? Hey guys! I've been reading this and several other threads in anticipation of repairing my front axle actuator housing while replacing my engine in the very near future. I tried read more you can pull the actuator connector off and measure the resistance of the motor coil with a multi meter, if the number is really low, or infinity high then the unit is bad. 4WD The problem is with the front actuator. Categories. Both problems will not set codes because all of the 4x4 engagement functions are working. My truck is a 2004 Chevy silverado 5. The transfer case is connected to the actuator and engages the front axle when the actuator is activated by the driver. 2005 Chevrolet Silverado 1500 - Four Wheel Drive Actuator Search Results. com and an adjustable wrench. I replaced it with a new one and this still happens. Drivetrain is a 2004 with 4L80e transmission and NVG 463-NP1. Silverado. Its flashing in the dash lights because is not RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. If it doesn't then the actuator is bad or there is a wiring problem. 3. The front axle engagement actuator contains the following circuits: A Run/Crank Ignition 1 Voltage circuit, a Four-Wheel Drive Wheel Lock Indicator Shop our 4wd actuator harness upgrade for Chevrolet/GMC Trucks 1988-98, Blazer and Suburban 1992-99. 7L 4x4 with push button four-wheel drive and the upgraded electric actuator. The actuator extends when in 4WD Low but the front wheels do not engage. Chevy 1aauto trailblazer gmc envoy front replace install actuator axle diy car videos repair 1a fix 4x4 4wdrive [solved] is it tccm or VEHICLE SERVICED: 88-99 CHEVROLET FULL SIZE PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND COMPONENT RELIABILITY. I have a 2000 Chevy s10 4. Chevrolet silverado 1999-2006 gmt800 how to replace 4wd axle actuatorTahoe 4wd actuator front axle upgrade wheel assembly wire bearing exploded shaft drive power part differential trailblazer intermediate chevy envoy Repairing front axle actuator, and theory of operationActuator 4wd axle chevrolet The front axle engagement actuator consists of a permanent magnetic motor, a worm gear-controlled plunger, a front axle switch, and an electronic control circuit within the actuator assembly. g. I've searched through the manuals on here and the ones I have, none seem to address the updated actuator. Plug it back in and have some one push the 4x4 button. Without trail boss. Drive Axle/Front Housing, Mounting, & Actuator are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Common failure is If you don't need help anymore, an update would be greatly appreciated :) Ask Your Own Chevy Question. Actuator works, light in cab not blinking. to/ib/1AFWA00006In this video, 1A Auto shows you how to remove, replace, and install a broken, ma In this video, we're going to show you how to replace the four-wheel-drive front axle shift actuator on this '96 Chevy Tahoe. 25 NEW OEM Chevy 1500 2500 So, as above, I now own a used 2000 LT with 180,000 kms that's stopped locking up the front axles. On my truck, the transfer case was fine and when I Code C0364 2014 Chevrolet Silverado Description. Suburban 3500hd. If this is the problem, you will not get the front drive shaft to engage when you place the vehicle in 4wd. We nodded our heads in agreement and excitement to find countless stories of others who shared our exact same issue. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. the actuator is engaged at all times when the motor is running and will not - Answered by a verified Chevy Mechanic hello, I have a 1996 chevy k2500 4x4. E/C. I'd take a guess and say it's the front actuator. 3 crank sensor wiring diagram. The actuator has 12V, ground, command signal in, and position signal out at its connector. Date: September, 1998. while the front tires usually don’t get any traction — a telltale sign that your 4×4 axle actuator is not working. . Part Number: RNB-600-101. 2003 Chevrolet 3500 Big Dually:smoke2: LT. In this environment, durable repairs require 4WD Yes i put a lunch box style auto locker in the front dif . i have finally decided to put the front axle actuator on a toggle switch. Its flashing in the dash lights because is not functioning properly. 1993 chevrolet k1500 z71, no power toactuator, actuator has been tested and is good. 4x4 problems. In addition to the actuator and transfer case, the Chevy 4×4 actuator system also includes various sensors and wiring. Full Member. While driving in 2H like any other day, the 4wd actuator engages in the front diff on and off randomly while driving. keep your old front axle actuator and switch cuz those are known good parts! Front Pinion Bearing. Front axle jerking; Grinding noise while driving; Metal scraping noise coming from the front axle; Usually, this issue can occur due to any of the following reasons – Failed 4WD actuator. Found a bit more time. If it does not have 12 volts, check the transfer case switch and the power feed to the transfer case. chevy axle actuator we have had many problems with actuator shorting out internal Would anyone know who might sell the Front axle actuator for a 91 Chevy 4wd on a Sunday? On the same note, my 4wd keeps blowing fuses and it will not engauge the front axle. Same type of threads. Sierra. So far I have replaced the transfer case switch, and the front axle actuator. if you have lifted the front end, disconnected the front drive shaft at the front diff, and you cant spin the yoke at all using a bit of elbow grease then yes, Id say there is a problem internally. They are a thermal switch from the factory, and the replacement is a different stye (i cant remebre exact terminology at this moment there are some threads on the site about it if you are curious) anyhow that is a very common issue with the 4wd on the 88-98 models. Look closely to the 1988 Ext. In my case, 4transfer case switches, one dash switch, vacuum hoses, one transfer case, one front axle actuator, one actuator cable, and 4 transmissions later, I Buy 600115 4WD Front Differential Axle Actuator Disconnect Housing Fits for 2002-2009 Chevy Trailblazer Envoy Bravada 4WD Front Differential Axle Disconnect Actuator Assy Replacement for Chevrolet Trailblazer GMC Envoy XL XUV Isuzu Ascender Buick Rainier Oldsmobile Bravada There was a problem filtering These sensors can include wheel speed sensors, position sensors, and temperature sensors, among others. Change Vehicle. Checked fuse, okay. Chevy 4x4 1995 z71 automatic actuator front ask question own1995 chevy z71 / 4x4 automatic ,5. Yes the front actuator engages the front axle but it can't be the only problem because if your transfer case was still in 2 wheel drive, it would never "drive" your front wheels unless your transfer case was engaged (power through your front driveshaft). Chevy Drivetrain - Slow Or No Engagement of Front Axle File In Section: 4 Drive Axle Bulletin No. can you tell me the answer to this question and thank Same problem here. Subject: Slow or no Engagement of Front Axle when 4WD is selected (Replace Front Axle Actuator) Models: 1988-97 Chevrolet and GMC K Models excluding 1988-93 Models over 8500 # XXXXX This bulletin is being revised to add information to the 2003 Chevy S-10 zr2 4x4 problems. Chevy 4wd actuator silverado 1997 wheel drive gmc yukon four front axle k2500 diagram wire z71 engage problems button fuse Actuator wiring 4wd axle Actuator 4x4 harness diagram chevy axle fr. While the engine is off: I turn the knob to 4hi or 4lo, you can hear the transfercase engage and the front axle actuator "whir" into action. If you can turn the front wheels independently from each other, you have a Front Axle Actuator Eliminator 1988-98 Chevy & GMC Truck Product Details. If it isn't, then it might be the sensor in the transfer case, a wiring problem make your actuator full time 4x4 diy fix I have been trying to get my 4wd working on my 2008 3500 dually. I pulled the actuator motor from the front diff and attempted to see if it was moving out of the diff, checking for weak motor. 05 May 2024 by Dr. I pulled the actuator out of the housing and pushed the internal (inside the actuator hole) engagement shaft with a ratchet extension. 2013 Chevy Cruze gear shifter was pulled out of park without brake pedal being applied now GM 4 X4 FRONT ACTUATOR DEMO / MACANIC 21. Replacing the actuator is the only lasting solution in this case. Tags 243c 4l80e 4x4 chevy c/k2500. I pull the front axle engagement My front axle disconnect was destroyed. Fuel Pumps & Related Components ; Gaskets & Sealing Systems ; Automatic Transmission . Here is also a TSB for this problem. The second would be the vacuum actuator underneath the battery tray that pulls the cable to engage the front axle. 73 (GT4) front differential (8 lug wheel) and 5. Jump to Latest Follow There are five electrical pins on a front axle actuator, does anyone know how to wire this to a toggle switch. These are all the normal items that fail. Join to discuss rebuilds, modifications, tech articles and more! You will know your 4WD actuator is bad when the 4WD (either 4H or 4L) becomes difficult to engage, gets stuck, or fails to activate. Then I plugged the actuator back in and pushed the 4WD button, nothing happened with I found out a vacuum problem was causing the front axle actuator to engage partially, causing grinding. 1988-2019 GM Front Drive Axle Actuator 26060073 GM | GMPartsDirect. 0 out of 5 stars My drive is back. The axle actuator and the transfer case both work together to deliver the needed torque to all 4 wheels. I think that it needs a hot wire going to both of the pins on the wiring connector. Put in new 4WD dash The front axle actuator has 4 wires in it, A is the signal wire to the ECM, TCCM, ABS, and so on to tell it when it is in 4X4, and is powered from C. It just dawned on me that my engine failure might be DUE to the front axle actuator housing failure! Chevy TrailBlazer, TrailBlazer SS and GMC Envoy RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Common problem could be the front differential actuator. Start and select 4 high position in drive release brake ad watch front driveshaft does it turn "yes" problem is axle actuator on passenger side of differential not engaging axle shaft. I've already checked G100 (the ground under the drivers door outside of the frame). The voltage to the 12v lead is a little low, and the ground is weak. I had the wiring all gone through (found that a mouse had made a nest Most of the Silverado 2500 model Chevrolet trucks have issues with the actuator failing in the front axle due to weather and road conditions. Replace actuator and fix problem. out, does anyone have the specs for the voltages at the actuator plug? NSToller Chevrolet Avalanche Problems, Q&A. However, they were finding many different solutions: 4WD switch, fuse replacements, Find 1989 CHEVROLET K1500 4WD Axle Actuators and get Free Shipping on Orders Over $109 at Summit Racing! Common Symptoms of C0359 Code. Good afternoon, i hope you are Buy Now!New Four Wheel Drive Actuator from 1AAuto. com http://1aau. Easy to use parts catalog. We have repaired over 2000, call Front Axle Actuator: This part engages the front axle. Drive Train Axles Bearings Problem 1980 Chevy Silverado V8 Four Wheel Drive Automatic On My K10 Truck I Am About To Put In A New Motor Asked by bojangels If it doesn’t respond to vacuum pressure, it’s likely that the 4WD actuator has gone bad. Shop for the best Four Wheel Drive Actuator for your 2007 Chevrolet Silverado 2500 HD, and you can place your order online and pick up for free at your local O' 2007 Chevrolet Silverado 2500 HD - Four Wheel Drive Actuator Search Results. Should be 12V on the brown wire at the actuator, and the TCCM should see 12V coming through the actuator on the light blue wire. Repair. California Residents: Prop 65 Warning. I accelerated away from a dead stop, went through a wide-open-throttle 1-2shift, and heard a loud pop followed by a grinding sound. Using a voltmeter, I determined 0 voltage was present on terminal C, (circuit 241, brown wire). I just joined the forum to search for issues within the front drive axle assembly. (or another Chevy forum) that this actuator would fit along with necessary wiring. Qty: Qty: "A" Fits models with thermal actuator. 5L. Does anyone have information on which color wires and their orientation in SOURCE: 2002 Chevy 4wd maby im wrong but if you rev up and only rear wheels spin that means that it might be 4 wheel drive but not constant 4 wheel drive or diff lock system ,,,, ,, in 4 wheel drive all wheells will turn together but if pressure of slip is bad enough or torque high enough only 2 wheels will drive ,,, thats why diff lock locks wheels together in each RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. With the actuator eliminator installed, the front driveline will turn anytime your front wheels are in motion, thus eliminating the lag time associated with thermal actuators and the need for forward motion to engage the 4WD system After even further research, we found that many folks were finding success in getting their previously broken 4-wheel-drive to work. Thread starter seipel1892; Start date Feb 14, 2016; S. ) Which resulted in either the shift fork snapping or the slide collar getting stripped out in the front axle. Like. Pretty sure Front Axle Actuator Chevy Problems. Its a 4 or 3 wire screw in plug I am seeking help from the tech experts on this board regarding the electrical schematics between the Transfer Case Shift Control Module (TCSCM) and the Front Axle Actuator (FAA). , corroded wire or faulty 4WD dial/switch: Problems related to electrical components or controls in the 4WD system: Component failure, e. The front axle control circuit consists of an electric motor actuator that engages and disengages the front axle. I checked it out and adjusted linkage etc, checked wiring for breaks as best I could, found no power to electric actuator on front axle. More precisely, it disconnects the hub and the axle Take the plug out of the front axle actuator, test the brown wire for power with the key on, and the light blue wire with the transfer case in 4wd. Chevy expert, ASE Certified Technician. Actuator repairing trailblazer envoy. If you ran the actuator motor so the protruding part was OUT and reinstalled it, the splined disconnect would engage the passenger tire to the intermediate shaft, but that wouldn't put you in 4WD mode unless you also got the dead TCCM to operate the encoder motor and get the transfer case The piece on the front axle is an actuator that engages when you shift to 4wd and that is what actually 'turns on' the front axle. 2008 Chevrolet Silverado 1500 - Four Wheel Drive Actuator Search Results. If when you put it in 4-High or 4-Low it doesn’t light, or if it blinks then turns off, you might have a problem with the transfer case shift motor/encoder. 4. You take your actuator The dealer just called me and said there were 4 codes stored and they pointed to the TCCM and the front axle actuator. to/ic/1AFWA000041A Auto shows you how to repair, install, fix, change or replace a failing, hello, I have a 1996 chevy k2500 4x4. Filter By When I push the 4x4 button the transfer case engages but the front axle actuator will not engage. 25, 9. 1997 Chevrolet K1500 Pickup. Can verify this by cycling the front axle a few times, then pulling the actuator to see if it is still in the extended or engaged mode. Actuator chevy wheel drive axle colorado shift replace install four auto ptm How to install replace 4 wheel drive axle shift actuator chevy colorado 2002 gmc sonoma 4. Before, that, I drove a 75 K5 The actuator may not be fully engaged or disengaged and the fork to the spline may be what is causing the whining or grinding noise you hear. The pigtailed 2 pin actuator in your comparison photo is a front axle actuator. This job is a front differential on a 2000 Chevrolet S-10 4WD pickup truck. I have a 1996 chevy tahoe and front actuator for Front Axle Actuator. I have it turned all the way. Take the plug out of the front axle actuator, test the brown wire for power with the key on, and the light blue wire with the transfer case in 4wd. : 76-43-01A Date: September, 1998 Subject: Slow or no Engagement of Front Axle when 4WD is selected (Replace Front Axle Actuator) Models: 1988-97 Chevrolet and GMC K Models excluding 1988-93 Models over 8500 # GVW If the wheels turn, check the front driveshaft watch for turning. am i right? 1989 Chevy K1500 Truck Four Wheel Drive Components at 1AAuto. Search Fixya 01 Chevy Silverado 4 X 4 not working. With it lifted and spinning one wheel only and not seeing the yoke spin doesn't indicate a problem, it just means the one axle is spinning freely Buy Now!New Four Wheel Drive Actuator from 1AAuto. T. to/ia/1AFWA00024This video shows you how to install a 4-wheel drive actuator in your 2002-2 Same as when you switch back to 2wd you can hear the motor on the transfer case and then the front actuator will move as well and the light will quit blinking and stay lit in 2wd. 23. Sierra, silverado. BUY WITH CONFIDENCE - All products have been 100% tested before delivery, If you have any problem with our Replacement 4WD Front Axle Actuator & Disconnect for Chevy Trailblazer, feel free to contact us, we will sort things out together. 7, replaced the actuator for theand Chevy impala blend door actuator: GMPartsGiant. com 1988-2019 GM part # 26060073 - Front Drive Axle Actuator The front axle engagement actuator consists of a permanent magnetic motor, a worm gear-controlled plunger, a front axle switch, and an electronic control circuit within the actuator assembly. But if you want to add a little more power then you can do it with the help of a 4WD actuator. Chevy Mechanic: Frank@AutoPro. The actuator is usually located near the front axles in or underneath the engine bay. Reviewed in the United States on November 20, 2023. Home. Remove the front axle actuator by unthreading the actuator from the axle housing. 7K members Since 2004 A forum community dedicated to Chevy Trailblazer and GMC Envoy owners and enthusiasts. I mentioned the 4WD front axle engagement problem I'm having but didn't specifically ask him to spend time on it unless he saw something obvious. I changed the front axle actuator today, and searched the forums, with vague results. I have power to the connector when I shift it in and it goes out when disengaged. you could also pull the actuator out and apply a quick pulse of 12V to it and see if it moves, C0379 is all about the axle actuator control circuit. It is similar to locking the hubs in the old days, but it happens inside the axle housing. A bad switch may cause the four-wheel drive system to be stuck in the permanently engaged, or disengaged mode. Helpful 1 ; front axle actuator chevy chevrolet four wheel drive four wheel drive problems wheel drive 1994 k1500 chevy 4wd actuator 94 chevy 4 wheel drive If it has 12 volts, the actuator is the problem. i have a 2002 chevy avalanche my problem is i cannot get my four wheel drive to engage. 4x4 problems with front differential. the GMC dealer and I just replaced the 2 pin actuator on my '94 K1500 and had no problem finding the exact OEM replacement. The front axle actuator, that engages a splined disconnect when you go into A4WD, 4HI, or 4LO - is a reportedly high failure rate item. 2 speed electric shift transfer case problems #1 jack up truck place on 4 jack stands. The axle actuator in Chevy Silverado. Crimped a new terminal on, reinstalled Buy 600-115 4WD Front Differential Axle Disconnect Actuator Assy, 600-115 4WD Front Differential Axle Disconnect Actuator Assy, Compatible with Chevy Buick GMC Vehicles - Rainier Trailblazer Envoy XUV Ascender,Replaces#12471631,12471623,15884292 There was a problem filtering A basic how-to on how to bypass the shift on the fly system, fix the floppy passenger side axle, and install the ring and pinion on the front differential I have been trying to fix the 4wd on my 89 chevy 1500 pickup. Chevy axle front actuator 4x4 avalanche 2004How to install repair replace 4×4 front axle actuator chevy trailblazer Actuator 4x4 chevy front axleVacuum differential actuator cable front axle housing shift disconnecting blazer drive removal autozone repair fig. Electrical fault, e. If it doesn't spin, the transfer case is in 4wd mode, so there is a problem with locking the front axle (anywhere from the sensor in the TC to indicate it's in 4wd mode, to the front actuator, or a wiring/power/ground problem) that you need to find I´m having problems engaging the 4x4 front axle and after having scanned the interweb for possible problems, it would appear that the actuator often is to blame. 00) but need to know if I need to disassemble the axle to replace it or can I do this while the axle is in place. This has happened to me two times because of my truck going dead over a voltage drain issue (my radio). the Front Axle Actuator, Electric, Cadillac, Chevy, GMC, Full Size Pickup/SUV, Each. I have a 2007 Colorado 2. Jump to Latest 9K views or is this likely just a problem with the front axle actuator? alike to all of these trucks, there is a 4wd actuator on the front differential. Gonzalo Pfeffer III. if the current actuator does not have a 5 way connector it will also require to order the connector part number 12117277. I replaced the front axle actuator with the new updated electric style. I'm wanting to stop the front actuator from engaging when you put the trk in 4wd unless I want it to engage the actuator . The front axle engagement actuator contains the following circuits: A Run/Crank Ignition 1 Voltage circuit, a Four-Wheel Drive Wheel Lock Indicator 4wd actuator problem. The dif really isn't the weak link in these trucks as much as the cv shafts are . Why does my Chevy Silverado’s 4WD system make a grinding noise when trying to disengage? A grinding noise may indicate a worn or damaged transfer case motor, issues with the front axle actuator, or problems with the gears inside the transfer case. The front axle actuator consists of a Permanent Magnetic (PM) motor, a worm gear Chevy 4Wd Actuator Upgrade Wiring Diagram - Cadician's Blog. When the TCCM grounds the light blue wire the actuator locks the axle. It will have the wiring diagrams, connector pinouts and diagnostic procedures to figure out where the problem is, so you don't have to throw parts at it to fix the truck (particularly given that it's more than 20 years old, it's If it is, then something is busted in the front diff (generally the passenger side shaft, or the locking gears). you can hear it engage when you push the 4wd button, but the Another symptom of a potential problem with the front axle engagement switch is a four-wheel drive system that becomes stuck. Our team of ASE Certified technicians can repair, rebuild, replace and install an automatic or manual transmission for your car or truck. If not, the motor may be bad. Escalade ESV. I have read other threads on this problem and had checked everything and i am baffled. Which would also fit with my abs problems. I've got a lift so I crawled under neath in the snow and watched the front drive axle from t case to diff spin while a buddy drove and the drive axle spins but the cv axles from the diff to tires don't. I found a small hole in the boot of the actuator (about 1/8" diameter) so I figured it 2) if you can spin the other wheel -> bad, something is wrong with the front axle being locked. Buy Now!New Four Wheel Drive Actuator from 1AAuto. My original front differential had the thermal actuator with a wire harness on the diff. CHEVROLET SILVERADO 2500 HD PUSH BUTTON 4 X 4 FIX /DAN SMITH. Please try again later. subject: slow or no engagement of front axle when 4wd is selected (replace front axle actuator) models: 1988-97 chevrolet and gmc k models excluding 1988-93 models over 8500# gvw condition: some owners may comment that the colder the outside temperature is, the longer it takes for the front axle to engage when 4 wheel drive is This is the actuator that shifts the transfer case. 88-UP C/K ACTUATOR UPGRADE VEHICLE SERVICED: 1994 CHEVROLET FULL SIZE PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND COMPONENT RELIABILITY. it's probably your problem. Verified Purchase. Chevy Silverado EV Forum 2K+ members. I was able to find the correct connector but have not found any references to connect the wires up to the connector. Filter By Brands Problem - 4hi light non-stop blinking, does not engage front axle. Here are some common technical causes for a Chevy Silverado’s 4WD system not disengaging. The actuator will automatically engage the front axle when the vacuum is lost. so I do not know whether it is a power wire or a ground wire. If front driveshaft does not turn, you have a problem in the front diff, or with the passenger axle disconnect. Call and ask the dealership how much but ensure they r ONLY scanning the single problem. The transfer case does engage when I manually select four wheel drive as the front drive shaft locks in. I'm just going to fast-forward through removing those two 8-mm bolts. I'm going to add some thread-sealing tape before we install it. Problems: Drivetrain & Steering . Take the front axle actuator out of the axle. Tried holding diff plunger in manually, rotated tires, does not engage. This spring I swapped out the front differential with one out of a 1992 blazer. 3M posts 176. Manual and Engine Fix Library Chevy front axle actuator wiring diagramActuator 4x4 harness diagram chevy axle front 2010 1996 gmc Hello, I am having problems with my front axle actuator engaging on my 1997 chevy silverado, I would like to test the wire going to the actuator to see if it is doing what it is supposed to do but my problem is the water is brown. I have found an exploded parts diagram which shows the actuator. Front axle actuator replacement on a Chevy Silverado. There was a problem filtering reviews right now. Buy Front Axle Differential Shift Actuator for Chevy GMC Cadillac Isuzu 4WD: GXYWADY 4WD Front Differential Axle Actuator Replacement for GMC Canyon Yukon Cadillac Escalade Isuzu i-350 i-370 Chevy Avalanche K1500 2500 3500 Silverado 600101 26060073 8260600730. SYMPTOMS: NO Hello. i have replaced the shift motor in transfer case and differential motor. I think that it needs a hot wire going to both The fuse is good. 4WD Stopped Engaging. When any 4x4 selection is made, the operated actuator locks the passenger side outer and inner axle halves together. Sparkys answersSparkys answers Silverado mode actuator 2003 chevrolet control ac tahoe 2007 gear code changing issue vent under First and easiest thing to check is the front axle actuator. Save Share. I have a 1990 Chevy K2500 with a 3. U may b able to pay a dealer mechanic some bones at lunch. 2004-2012 Chevrolet Colorado Forum / GMC Canyon. Sudden pops while turning indicate that your CV axle may need a replacement. A1 Auto shipped out the part quickly and I had no problem installing the actuator after watching the A1 Auto video. In this video I show where t The front axle actuator engages the splined disconnect in A4WD, 4HI and 4LO modes only. File In Section: 4 Drive Axle. The plunger is retracted. 88-99 CHEVROLET FULL SIZE PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND COMPONENT Where is the 4WD front axle actuator located on my 1995 chev. Contact seemed like the problem was in the front axle area, I decided to check the front axle motor actuator next. Tapered roller bearing elements that support and allow the pinion gear to rotate within the axle or final drive housing This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Buy Front Axle Shift Actuator 4WD 4x4 for Chevy GMC Tahoe Yukon Blazer Suburban: Four Wheel Drive There was a problem filtering reviews right now. Tony 866-403-3393 Nice info. Front Axle Shift Actuator 4WD 4x4 for Chevy GMC Tahoe Yukon Blazer Suburban. can you tell me more about front axle shift actuator? I have 04 chevy Silverado z71 the other night I heard thumping noise under my feet then it stopped and today I tried to put it in 4wd but it won't go into 4wd. Quick Solution It is located under the front of your truck (almost in the middle). Should be 12V on the brown wire at the actuator, and the TCCM should see 12V coming through the actuator on the light blue This series of trusses not only builds on our experience as the world leader in axle truss design, it brings it to a whole new level of cost savings, strength, weight savings, The actuator for the front axle does not engage. Cab S-10 4x4: 5" TrailMaster Suspension, another 1 1/2" suspension lift (shackles and torsion bar tweak), 3" body lift, nerf bars, rollbar with three 100w lights, and one backward light (to keep the tailgaters backhehe), push-button starter, sub amp and stereo, brushguard with two 100w halogen offroad lights, bumper welded up to match body lift, REMOVE THE FRONT AXLE ACTUATOR BY UNTHREADING THE ACTUATOR FROM THE AXLE HOUSING. Electronic Actuator #37-0786, sold separately, is required to complete conversion. Speed bumps can also be problematic. Chevy front axle actuator wiring: q&a for gm pickup Blazer s10 actuator system silverado brake 1990 axle vac 2wd blazerforum diagrams 1995 alternator diag 2nd typo How to install replace front axle actuator 2007-2013 chevy silverado Chevy 1aauto trailblazer gmc envoy front replace install actuator axle diy car videos repair 1a fix 4x4 4wdrive It has been been 7 degrees f with a -14 f windchill and wonder if the weather is a problem. When looking for signs that your CV axle needs to be replaced, keep in mind that many subject: slow or no engagement of front axle when 4wd is selected (replace front axle actuator) models: 1988-97 chevrolet and gmc k models excluding 1988-93 models over 8500# gvw condition: some owners may comment that the colder the outside temperature is, the longer it takes for the front axle to engage when 4 wheel drive is 4wd front axle actuator. Actuator grizzly front axle forum Repairing front axle actuator, and theory of operation Chevy 1aauto trailblazer gmc envoy front replace install actuator axle diy car videos repair 1a fix 4x4 4wdrive. Use a DMM or test light to check if the actuator is getting a signal from the TCCM. My problem is the 4x4 actuator will not disengage. This is our new one from 1aauto. 06-07 The front axle actuator motor consists of a permanent magnetic motor, a worm gear controlled plunger, a front axle switch and an electronic control circuit within the actuator assembly. This is also why you will hear it grind if you try to engage 4x4 when the shafts are spinning different speeds. No problem with dif, This is our old four wheel drive actuator for the front axle of our vehicle. I chose this wire based on the wiring diagram, which showed fuse 24 in the IP fuse box feeding voltage to the front axle motor. to/2F8syFE Amazon Links to my commonly used tools: more. Additional Shipping Charges Shop for the best Four Wheel Drive Actuator for your 1999 Chevrolet Silverado 1500, and you can place your order online and pick up for free at your local O'Rei. 0 out of 5 stars working perfectly. I have a 1998 k1500 1/2 ton pickup with pust button 4wd, and an electric actuator, 4 prong. The copper had corroded and it was no longer making contact with the ring terminal. Disconnect the actuator's electrical connection at the front axle housing. The actuator on the Ford F150 connects the wheel hub to the axle shaft when the 4WD mode is selected. If both the encoder motor and front actuator function there should be no reason it will not go into 4wd. and other debris take a toll on 4WD parts—but it's mile after mile of stress on the driveline that creates the real problems. Category: Chevy. Front Axle for 1997 Chevrolet K1500 Pickup. This bulletin is being revised to add information to I have replaced the front axle actuator (yesterday). Forums. When the actuator stops working, you'll know because you won't be able to lock the front Performing a Chevy 4WD actuator bypass entails modifying your old actuator, flipping the shifter fork, and installing free wheel hubs to serve as your pseudo-4WD setup. Identically in each of the modes. 3 W/manual T case FYI. If a tree limb was ran over, its possible to rip the wiring out of the actuator. Model Code: 4 I just recently lost four wheel drive on my truck. com offers the wholesale prices for genuine 2002 Chevrolet Tracker 4WD parts. It is a new actuator, and I tried it on another truck I have. yousef Alayoub. It installed perfectly except for one small problem, the actuator connections didn't line up. If you encounter the C0359 code, you may notice common symptoms such as difficulty shifting into or out of 4WD, erratic 4WD operation, and an illuminated service 4WD light. 9L Manual Transmission. Part Details. This should work great in our vehicle. The problem is or low and the lights on the push button switch will New tc pressure switch and new front axle actuator. Because of its location, it is prone to damage due to impact, corrosion, and water Sounds to me that your front axle actuator has gone bad. In this case, you need to figure out if the actuator in the front diff in moving in/out as you shift between 2wd and 4wd. It's not a problem of it sticking though. The experts at 1A Auto show you how to replace the 4x4 Axle Actuator on your 99-06 Chevy Silverado and GMC Sierra. IF THE CURRENT ACTUATOR Front Axle Actuator Eliminator Product Details. Engines/Performance/Tech Questions. 1994 Chevy K1500 Z71, 6. If both have power then test the I have a 1998 Chevy blazer. Estimated Crown Automotive 4WD Front Axle Actuators 68312884AA Axle Locker Actuator, Front or Rear Axle Locker Actuator 2007-2018 Jeep JK Wrangler w/ Rubicon Package. 2002 chevy silverado 4. I have the updated solenoid type actuator with like 5 pins in the plug. The only items you'll need for this is a new four wheel drive front axle shift actuator from 1aauto. I can physically hear the the actuator motor when I press 4hi. Jump to Latest 2K theres an encoder motor on the transfer case. Install the spacer from the wiring kit into the axle tube with the flat side seated against the shift fork. Wiring chevy actuator 4wd s10 4x4 tccm 2001 wires cheyenne schematics Front 4x4 axle gm actuator gmc switch ton pickup housing mid half 2010 toggle electric cab Chevy 4wd actuator upgrade wiring diagram. The problem is with the front actuator. Find 2017 CHEVROLET COLORADO 4WD Axle Actuators and get Free Shipping on Orders Over $109 at Summit Racing! With the truck in "on" position and front wheels jacked up off the ground, if you can turn the driveshaft with your hand, you have a transfer case problem. Choose top quality brands AC Delco, Dorman, Forecast, Replacement, SKP, Standard Motor Products, Wells. The front axle actuator engages and disengages the front axle. 1. I don't carry a spare on the trails, but I've been considering it. I also need a pin out of the actuator. The light wire is the ground for the front axle actuator. Obviously, the problem is that the solenoid doesn't actuate. 6L, 4 Cyl 2. Buy Now!New Axle Shift Actuator from 1AAuto. Chevy Silverado and If when you put it in “Auto” it blinks for a bit then stays lit — or if it doesn’t blink, or blinks then turns off — you might have a problem with the front axle actuator. Motoforti 4WD Front Four Wheel Drive Actuator, 4x4 Front Differential Axle Actuator, for Chevy Silverado Avalanche K1500 K2500 K3500, ABS, 26060073, Black. The front axle engagement actuator contains the following circuits: A Run/Crank Ignition 1 Voltage circuit, a Four-Wheel Drive Wheel Lock Indicator The dreaded blinking 4×4 light on Suzuki Vitara and Chevy Trackers is pretty common. The vacuum problem was a combination of a stuck transfer case vacuum switch, and also a small leak on a rotted hose under the hood. Bulletin No. to/ia/1AFWA00004In the video, 1A Auto shows how to you how to remove, replace and install a Motoforti 4WD Front Four Wheel Drive Actuator, 4x4 Front Differential Axle Actuator, for Chevy Silverado Avalanche K1500 K2500 K3500, ABS, 26060073, Black. The actuator moves a shift fork that slides a collar that then engages the passenger side drive. you can hear it engage when you push the 4wd button, but the light keeps blinking. : 76-43-01A. And this is how the 4WD actuator works. 5. seipel1892. In summary, the Chevy 4wd actuator consists of an actuator motor, actuator fork, control module, wiring harness, and sensors. Product links below!OEM GM solenoid: http://amzn. I've already tried a new one. It has the push button 4x4 and I have been dealing with issues for 3 years on this system I have replaced the front axle actuator twice, the t-case encoder motor twice, the dash switch once, and the 4x4 control unit once. Shop for the best Four Wheel Drive Actuator for your 2008 Chevrolet Silverado 1500, and you can place your order online and pick up for free at your local O'Rei. Duramax/Ally, OK, I wanted to be sure. I'm not sure if it's easy to do with an automatic transmission, but the front differential Its probably the four wheel drive actuator its a common problem with the 90's chevys. Chevy 4wd actuator silverado 1997 wheel drive gmc yukon four front axle k2500 diagram wire z71 engage problems button fuseChevy actuator heater silverado s10 2005 gmc sierra front axle actuator wiring databaseFront 4x4 axle gm actuator gmc switch ton pickup housing mid half 2010 -New front axle actuator (I've had it out of the differential and plugged in to verify the plunger goes in and out. I am working on a 1993 chevy K2500 truck. Common Symptoms of 4-Wheel Drive Problems in Chevy Colorado. do you have any ide the problem? It allows the driver to switch between 2-wheel drive, 4-wheel drive high, and 4-wheel drive low modes. An 8-mm socket with an extension and a ratchet. com. Sort by Oldest first Front Drive Axle Actuator (11) Front Drive Axle Inner Shaft Housing Bolt (12) Front Drive Axle Clutch Fork Shaft Chevy Silverado EV Forum 2K+ members. These issues often point to problems within the front axle control circuit. Posted on Oct 29, 2010. 0 out of 5 stars Problem solved. The C3079 is the Front Axle actuator. My truck has the manual transfer case selection on the floor. Great replacement part! Charles C0379 is all about the axle actuator control circuit. We can see right in here, there is our axle actuator. Four-wheel drive when you need it. After checking to make sure everything is working in the transfer case and the front axle, I don’t think I am I have a 2002 chevy S10 4x4 pickup. Make sure there isn't any slop where the CV axle tripot goes in for example. Have power on actuator plug, but actuator does not move. I have 14v going to the thermal actuator in 4WD low. So I disconnected the wiring and took the front axle actuator out. How to install repair replace 4×4 front axle actuator chevy trailblazer . to/2yVPMXAAfte I have a problem with the 4wd on my 97 k3500. They took several days to figure out that the front axle actuator was shorted out somehow, and that was causing the “Service Parking Brake” to come on. The housing to the old one broke where it goes into the oil pan. If you have a service 4 wheel drive indication come u 4wd. I have no idea why the NAPA replacement part list shows that 5 pin actuator as being a correct fit. Parts fit for the following vehicle options. 3 v6Actuator silverado chevy front gmc axle sierra replace 2007 install Sparkys answers2015 4wd actuator problem. I visually verified the actuator does extend when in low. with a multimeter I have checked for voltage at the transfer case switch and I seem to have 12v between terminal A and C, but I also have 12 v between The front axle engagement actuator consists of a permanent magnetic motor, a worm gear-controlled plunger, a front axle switch, and an electronic control circuit within the actuator assembly. First, you're going to remove the skid plate. it could also be the TCCM (transfer case control module) it is located behind the 4X4 selector switch. Front Axle Engagement: In many 4WD systems, the front axle is engaged by default when 4WD is activated. Shop for the best Four Wheel Drive Actuator for your 2005 Chevrolet Silverado 1500, and you can place your order online and pick up for free at your local O'Rei. Buy 4WD Front Differential Axle Disconnect Actuator Assy Replacement for Chevrolet Trailblazer GMC Envoy XL 【Premium Design】It identified the internal problem areas and used a different alloy steel for the internal gears and fitted the internal housings with premium quality precision made-in a needle bearing with unique I'm looking for a schematic of the 4x4 front axle actuator circuit. when this happens the switch on the T-case sends a vacuum signal to the front differential actuator which pulls in a diaphragm which pulls on a cable to engage a clutch fork in the front differential to engage the driving wheels. Come join the discussion about chevy front actuator. If it is, and you know that its supposed to be retracted either Trying to rewire my front axle actuator on a 2017 Z71. If it is, then something is busted in the front diff (generally the passenger side shaft, or the locking gears). Filter By Brands Im suspecting a failing front axle disconnect actuator, have had to replace lots of those for not engaging/or staying engaged when commanded off. Failure to have your actuator fixed timely will cause severe and costly damages to See more I have a 1997 Chevrolet K1500, Ext cab, 350, 4x4. I also need a new grille (posted in the aftermarket forum) and have only been able to find the Chevrolet one, not the GMC. I can buy a replacement actuator ($110. spins, the transfer case is working. 01 chevy tracker 4x4 will not engage. It's on the front of the front differential and is plastic and has wired going to it. B is the pin that gets grounded by the transfer case control switch to enagge the actuator. Purchased the truck wrecked and the connector and wires were ripped off in collision. If it does there is a problem in your front diff or some where else in the system. The axle switch signal circuit will have 12 volts when in any 4WD mode or AWD mode and 0 volts when in 2 high or neutral. lk wo up yf ll bn am et zx qz