Gmt400 4x4 actuator. 3 KB · Views: 28 .

Gmt400 4x4 actuator If not,replace,or make sure the case is Saw it in the LMC catalog, except its $180 for basically a damn bolt. BE SURE TO NOTE: The non-thermal actuator requires a spacer to work in the trucks that came with the thermal one form the factory. I think this is the matching harness for the 2nd generation actuator: Front Drive Axle Actuator Harness - 88959465 (replaces 12376316, stamped ZLS, ZLT, ZLW ZLX, ZLY). The other wire will be the output to the axle actuator. Drivers, and both rear passengers. My problem is I have 4wheel drive low but no 4 wheel drive high. Need help with 4x4 actuator. 4x4 actuator is shot. However, my understanding was that the K2500 and K3500 both had the 9. Either you have one of the thermal style with two blade (or two round) terminals I was reviewing the "Front Drive Axle" section in the 2000 C/K service manual, volume 1, pages 4-54 – 4-102. That's the front differential actuator. Its handy if you want to run 2wd low range. Must be this isn't so common on half ton 4X4's. I'll check this. If I could recommend, upgrade your front actuator if you want reliability. Maneuvering trailers in tight places, pulling heavy stuff slowly on the street, etc. Including the wires to the actuator. Not sure about the stamps, but I believe the actuators are all pretty much the same. 7 vortec but the problem is the TBI 5. I warrantied the electric Dorman out through Amazon and ordered a new thermal unit like it had from stock. MikeRWK OBS Enthusiast. my 97 k3500 had a thermal, i got the gm conversion kit with electric actuator, new harness and relay. Hey guys, got a bit if a brain tickler for yall. GMT400 Enthusiast. Got my truck with the 4x4 actuator blown in it, so any time I've needed 4x4 I had to jump out and swap in a modified actuator to get the front engaged; and the ol boy I bought it off of said I could run it in 4lo with the 2wd actuator in. The connector that connects to the actuator only one wire has power and the green or blue looking color wire doesn't does anybody know what my issue is and could it be encoder motor that bad I have a 1988 chevy 1500 4wd. Jan 17, 2011 #5 But always, the lights don't light up, and the truck just doesn't lock into 4H or 4L. and if im correct the 4Lo will still work properly because i left the trans case switch in place and connected, because PCM looks for ground in 4lo. C. The actuator didn't correct my issue. 3 KB · Views: 28 Bought a front diff off marketplace. 1995 GM 4x4 Actuator Wiring Diagram BENZ 210618 02. Change your front actuator, that will cause the symptoms of the front not coming in (obviously) and the 4x4 light from lighting up. This wiring diagram was a big help:http:// The 4 wheel drive actuator could be incorrect or broken. I have my actuator on a toggle switch and accidentally drove with the front end engaged in 2hi and was fighting the steering to keep in a strait line. Oldchevyguy. I gave it to my daughter and two weeks later the truck is back and missing the rear drive shaft and half the transfer case. 4) if you have power at the actuator pull the actuator out and see if it moves when you shift it to 4x4. Does anyone know what is different on the axles like mine (plastic 4 contact front axle actuator). . My Simple EVO Steering-Feel Modification Some have chosen to disconnect their EVO plug on the back of their power steering pump for various valid reasons. Jul 26, 2013 #1 K. I decided to pass on the truck but I like the 5. I have a 1993 light duty 2500 and all the wires for the 4 wheel drive have been broken off the front differential. i have the motorized actuator and i have taken it out and verified that it is working and i have made sure that my 4x4 light comes on and everything electronically is working. On a side note, this appears to have a red wire going to a "transfer case synchronizer" from the relay. This actuator is notorious There are two main differences between actuators for the floor shifted transfer case. I'm guessing up top where the transfer case switch is the connector to it seems to be shorting out!!!!! Wiggled some more and the actuator goes in and out like normal, but when i don't touch it the 12v disappears. Well that didnt fix my problem. The Thermal actuator only has two wires. kurt Newbie. Note that this kit is only plug and play with the round terminal connector style thermal actuators, you may have to modify the harness and splice in the connector from your existing Hope this is the right spot, I have a 96 k2500 6. works like a charm. soo, i have no 4x4 in my 1989 stepside, so i figured i would check the fuse before replacing the actuator, sure enough, fuse is blown and its a 30A instead of the 25A that's suppose to be in there, put new fuse in and it blows right away, even with the truck in 2wd. Dorman sells a kit to do this (Dorman 600-600) but If you have the pigtail you can use that instead. It’s a 1997 k2500 with the 454 push button 4wd I know on my 96 k1500 there was a updated actuator from thermal to electric which my truck has and was done by the previous owner. I've slowly been putting time and effort into getting it %100. 4x4 Actuator Retrofit kit? Thread starter MikeRWK; Start date Jan 5, 2011; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Put in a new 25A fuse in that slot and still no 4x4. When I go to put it into 4x4 and shift into drive the 4x4 fuse keeps blowing. I am blowing 4x4 fuse even with actuator unhooked. There are a few members My dad has been complaining lately that his 4wd takes forever to engage. Saw it in the LMC catalog, except its $180 for basically a damn bolt. Can I just run new wires to the actuator and to a toggle switch on the dash? And simply turn it on when I pull the lever to Possibly, have you followed all wires from the front actuator. Forums. I've been told it could be the 4x4 actuator, but what are some other possibilities fellas? Aug 23, 2011 #3 96k1500 Ballin on a budget. He had the transmission rebuilt, transfer case rebuilt, new Tccm, new and updated front end actuator, new push button switch, and new actuator motor on transfer case. I have replaced transfer case switch already. Went ahead and ordered the upgrade kit from old Thermal to newer style. FYI, I have the 4 contact plug actuator. The new style actuator in a new-style housing doesn't need the spacer. Applied threadseal to new on my 97 z71 with thermal 4wd actuator i'd like to convert to electrici have an electric actuator and pigtail from a boneyardi can machine the spacer Forums. Thread starter kurt; Start date Jul 26, 2013; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. With the ignition on, there is no orange indicator light on stating the truck is in 2hi. IF you just slap the actuator in there, it won't work. The lights for either 4wd high and low just stay blinking. please excuse my ignorance but I'm curious how the transfer case works with the manual lever and electronic actuators and how that differs from the push button instatrac models. 9 KB · Views: 29 GMT800 Front Axle Actuator PINOUT 210827 02. If it does extent then re install it and see if the front diff locks in. The pushbutton and the lever t case both have a transfer case switch and there is a technical service bulliten about 4x4 and 2 wheel shift That cable actuator does replace the thermal actuator. I just unscrewed it and put a 7/8s socket from harbor freight in there between the differential and the actuator for the time being. There are only 3 pieces to the electronic shift crap. Dorman part 600-600 the electronics break, and thats not fun, the actuators go out, fuses, plug/wire issues. However, on that year I could bring the brown wire into the cab and plug it into the accessory block under the dash and it worked great. I had a bunch of my wires fried around my starter area not too long ago so I chalked it up to all of that but I had a friend follow and re-wire all of them and I'm pretty sure 4x4 isn't working again. 12. Think it might be the actuator. I'm new to the 4x4 world. front diff actuator, transfer case encoder motor, push button on dash, and transfer case control module. This give us some knowledge of these vehicles, form having to repair them. Just a big wrench, unplug it and screw in the new one. New posts Search forums. In general, I avoid Dorman products when I have a choice--they're almost all Chinese. My push button 4x4 won't work and my issue is my 4x4 lights blink in 4hi and 4low I replaced the front actuator and t case switch and nothing. The way I have it wired up now turns my 4x4 light on but doesn't engage the front axel. And one to the base of it where it connects to the diff. on a 96 chevy actuator wires what color is power and ground im trying to test the actuator the colors are black,brown and til colors. What's new. Looking However, the 4x4 won't engage. Take a look at the Dorman kit, though. Big problems with wipers. Mkae sure you get the wiring harness with the kit or the actuator wont work. I just replaced the actuator on the front diff, but still no 4WH. If that's all working, then the issue is probably in the actuator on the front diff. If no broken wires it's probably the tcase switch on top of the t case. 5TD, the 4x4 won’t “lock in” to 4hi, just blinks, I used to have to go from drive to neutral and back to get it to work but now it blinks, if I hit 4lo, the 4 hi light goes solid and the 4lo light blinks but the front tires spin even though it’s NEEED HELP!!! So my 4wd doesnt work and my actuator does. Told him the GT4 RPO code and that it’s 4x4 auto buttons. I went to Advance and picked this up So I'm looking underneath the truck trying to find the actuator (I have never worked on a Hi all. Just installed that and it won't work either. Got to looking at it (new to me diff) and it’s got two plugs. Members. The older style takes a bit longer to engage and doesn't have as much force, so Have you checked the actuator on the tcase itself, ik you mentiond checking the front but there should be another on the tcase. BTW, auto locking hubs. Do you have 12 v on both sides when you shift into 4x4? The ground wire is on the back side of the front axle extension housing, passenger side, in the 2 plug connectors. That is if the two actuators actually screw into the same hole in the first place. Much to my surprise the truck has already been retrofitted with For a manual shift NP241C in a 94 K150. Here is where the wires for the front axle actuators go according to the schematic for a 99. 7 TBI over the 5. Joined All 4x4 gmt 400s have a transfer case switch. I was told the problem was most likely the actuator, so today I bought a new one (mine is the 5 pin style) and replaced it. I realized after buying it that the 92' diff that i bought has what i believe to be a thermal actuator or some kind of actuator that my stock 98' differential does not have which means there is an extra connection that i have nothing to plug into. Log in Register. I thought you were referring to the encoder motor on the t-case, next to the front driveshaft. I just picked up a 1997 K1500 4x4. Four Wheel Drive Axle Actuator Wiring Diagram GMT400 210828. In this section, there is consistent distinction between the front axle on K1 and K2 models versus K3 models. I have that on my 97 Dually, it is handy to have 2-low or guaranteed 4wd in -30 temps. Brown wire- this is power in coming from a 25a 4wd fuse under the dash. Truck was still in 2wd at the time and felt like it was in 2wd also. I just rebuilt every thing in the truck except the motor and transmission. Power comes from the Heater\AC fuse to the transfer case switch on the brown wire. I did not want to do that because it results in maximum hydraulic boost and a light steering feel at all times. That means, that we all own or have owned a GMT400. The spacer is going to kill your mpgs and drive like a pos. Is the light representing the front axel on the 4X4 indicator on? Secondly have you checked the fuse, in the fuse box, to see if it was blown? If the fuse isn't blown, take the actuator out and see if its extended or not. 1 KB · Views: 29 GMT800 Front Axle Actuator 210827 01. It's got about 200k miles so I'm sure my actuator just went out but MEAN GREEN when you say put thought id come back and say i ended up just using an add-a-circuit fuse, and running a toggle switch and wire down to the actuator. FWIW, my '97 K1500 Suburban (built in December of '96) still uses a thermal actuator. As far as the front axle actuator i can't remember if it was 97 or 98 they stated coming with the 5 wire electric motor actuator. I bought a 8. Took me longer to get the skidplates off the front of my truck than to switch the actuator. It will go 12 v when you shift into 4x4. So now I remove the new actuator and with it plugged I push 4HI to verify that the actuator is doing its job and it is engaging and disengaging as it should. If you click them and make a purchase, we may earn a small commission. 107. It won't blow fuse with the 4x4 relay unhooked under the hood. Anyone have any Went ahead and ordered the upgrade kit from old Thermal to newer style. If needed stick a 1. The instruction Had the same problem. Basically if ya dont know it locks the axle so its instant 4x4 instead of taking 10 seconds to engage. I reused the same one from my old frame (I did a frame swap) since the new frame had an electric push actuator instead of the manual one. Free Shipping - 4x4 Posi-Lok Positive Axle Engagement Systems with Next would be to see if the case goes into 4x4, and verify the shaft is spinning. 1; 2; 3 New HVAC Blend Door Actuator Does Not Respond. Joined Nov 12, 2010 Messages 59 Welcome to 4×4 Posi-Lok You paid thousands of dollars for your 4-wheel drive! Shouldn’t it work when you need it? Whether you use your 4-wheel drive once a year or daily, 4×4 Posi-Lok is the only sure thing. i would just swap to a manual floor shift but the money isnt there right now and its So I found these wires in my engine bay Ive been slowly fixing this up and I assume they go to the 4x4 actuator. Registered members Current visitors. I have a 95 silverado 5 speed with floor shift 4x4. Can anyone shed some light on this? Thanks!! Investigated a little more and decided to trace and wiggle wires boom actuator pops out. 4x4 Posi-Lok Positive Axle Engagement Systems 400 POS-400. If you have 12V,the switch is good. Thread starter Just2Sweet; Start date Dec 19, 2011; In this episode I show you how simple and quick it could be to get the four wheel drive working again in your Chevy or GMC truck. When in 4WD,you should see 12V out on the blue wire at the transfer case switch. Not fun at all I am converting my 1996 K1500 4x4 actuator to the servo motor style. i would love to see how u made thats work as im having simalar issues with my 92 k2500 i just need my 4x4 to work untill i do the axel swap to Hello My '94 Silverado ext cab short box 4x4 is blowing fuses for the 4wd. Also, the colder it is outside, the longer it will take. so i just left the fuse out of the 4x4 circuit. There are some little parts there that can break, but this probably has the thermal actuator in it, and those are a more common failure point. for around $400 canadian or as I found out the kit can be purchased from napa etc for around 100. My question is this. It may have been a mid-year '97 thing. PNG. 4x4 actuator My actuator got caught and ripped out the wires while wheeling. Today we're talking about how to use a new actuator in an old differential on your GMT400. look forward to hearing from someone charitable whats up guys, ive got a 1994 full size blazer 4x4 its only got 63k original miles motor and tranny my uncle had it sitting for a while and i picked it up, he never used the 4x4 but i plan to its got the floor shifter, i put it both in hi and low and the transfer case engages an front If it is push button 4x4 it has an encoder motor on the transfer case several GMT400s had them. I have a 1995 k2500 with a 4x4 manual floor shifter. New posts Latest activity. So I bought a 94 chevy 1/2 ton 4x4 and was going to use the 241 c out of it. Check and make sure you have a constant 12V there at the transfer case switch. Removed thermal actuator, cleaned threads, installed new spacer plug. If I could only get the wiring diagram for the vacuum system and compare that to the newer driven electric system maybe I could get this to work. The 2-wire plug will have 12 v, key on. im at my wits end here and NEED 4hi for the winter. One to the actuator itself. Looks like it is a direct replacement. 25" Okay to start with yes that is the actuator, I'm not sure on what colors the wires are but your described the right location. If you unplug the actuator it should be obvious which one you have. Dec 7, 2024. Amazingly the 3rd one has worked for over a year lol. Hello there. Actuator Link I have heard a bit on "thermal" actuators or an updated one that needs a wiring change. Well, finally got some time to address my 4wd actuator on front axle. I would say with 99% Certainty that your problem is the 4X4 front diff actuater located on the front differential offset to the passenger side. The buttons on the dash, the shift motor on te t-case, and the actuator in the front diff. APDTY 711711 4WD Actuator Wiring Harness For Four Wheel Drive Actuator 711212 or GM 26060073 (Can Also Be Used As An Upgrade On 1988-1996 Models With The Older Thermal-Gas Type Actuator) 4x4 Actuator works, transfer case engages. SLO2LRN. It was the actuator. I don't have z cable. Used Dorman 600-600 harness and Dorman 600-601 actuator. I pulled the fuse in case it was engaged. If it's getting power in what should be 4wd, check it for functionality. I think the non-thermal one has three or four. I've checked alll the wires and If you want to convert from a thermal to an electric actuator you'll need the electric actuator itself and the Dorman wiring/spacer kit, part number 600-600. The actuator wires are cut I am gonna replace the actuator. More than likely, the reas thanks guys all the info yall have is extremely useful and the rite up answered pretty much all the questions i had so far . I have replaced the 4wd actuator and checked wiring there is power to it because when I try to activate the 4wd I can hear a thud on the front diff which is the actuator I'm assuming. There is a white 4 pong connector on the axle, which actually only has 3 wires in it to connect to. Then when I needed it 4wd i how long did it take? all of our GMT400 4x4 used to take awhile to engage, Even though its a manual Transfer case, it still has a electric actuator. I told him about it and then I got to Remove the front diff actuator from the truck but leave it plugged in and see if it extends when you activate it. Does anyone have a diagram or can someone just tell me how to wire it? T case switch and actuater are both working. Its a 25A fuse, I tryed a 30 and it popped right away too I have a 2000 K2500, manual transmission with the 4x4 shifter on the floor. SLO2LRN; Dec 7, 2024; Replies 0 Views 262. any ideas? I need to replace 3 of the 5 lock actuators on my Suburban (99). It is more likely this one since the old frame had an unknown amount of milage on it. if yall have anything else yall would like to add then please feel free The Thermo actuators on these trucks are horrendous, and I've even had issues with the updated electric actuator, the only thing I can think of is the permanent locked in diff bolt sold by LMC, but they have been sold out for as long as I can think. Jan 5, 2011 #1 M. WTF??? Help me please. Ahh. These are the 4 wires in the 5 pin harness that goes to the actuator. The one that lights up the rears in the picture works but not the one in the front when I shift into 4x4(the bulbs are good) With a manual shifting t-case is there a shift actuator on the front diff or anything that sends a signal to turn the lights on? I have a 1996 k1500 z71 The 4wd does not activate it is an electronic one with buttons on the dash. the only things i think are left are the transfer case itself or some sort of wiring problem somehow. Dec 4, 2024. The front differential could have a bad bearing. Removed thermal actuator, cleaned I am trying to replace my actuator but I think I might have the wrong kind. Joined Jan 30, 2014 Messages 538 Reaction score 393 Location Maryland. I wanted to know exactly what needs to be done to swap out the manual stone age 4x4 to a more modern pushbutton 4x4. Still no 4x4. Seems I am hooked also. I also have your 'jam something in the actuator' fix on my Plow truck. I unplugged the harness from acuator and it didn't blow the fuse, so I removed the acuator and left it plugged into the trucks harness and left the acuator on the ground and shifted into 4x4 and it extended without blowing the fuse. They have an electric actuator that locks the left front axle half shafts together that has to be turned on or you will have no 4 wheel drive. The electric is much more reliable than a thermal actuator, although at a When you engage 4x4 obviously the transfer case starts sending power to the front diff, but there's also an actuator on the front diff that when powered connects the right hand front wheel to the front diff. the 4x4 hasn't been working for about a year or so now, I just recently got it functioning and wasn't sure if it had a dash light Mar 15, 2022 IMO, see if the actuator is getting power. If it's working right, you should suspect the t-case shifting motor. In a manual shifted transfer case how would it ever turn on the actuator if had no way of knowing you shifted the transfer case? I have a 1990 k2500 silverado. Its a "Thermal Linear Actuator", so it heats up and then pushes it out. My 4x4 indicator light isn't working. It’s from an unknown gmt400. So any help would be greatly appreciated The new-style actuator in a housing intended for a thermal actuator needs a spacer similar to your socket. It includes a thick metal spacer. There is 5 wires coming out of the main harness. For the heck of it I checked all the fuses and #2 TCASE, #12 HTR - A/C, and #24 4WD are all good. Yep that would be a sign of a malfunctioning The thermal actuator relies on heat to move and engage, whereas the electric simply is powered and it engages. If the t-case is locked in 4wd due to a failed motor but the actuator has the collar retracted, the front shaft is spinning but you're in 2wd. I am going to replace the actuator on the front differential with this one. I just recently purchased an 89 z71 a few days ago and the front axle does not pull at all when shifted in 4 lo or 4 hi. Easy upgrade from the crap thermal actuator to an all electric one!Doorman 600-600 and 600-101 are needed for this. I bought the truck from a buddy of mine. Is there another way to do it? i heard ya just stick a piece of pipe or Hello. 109. thanks for that 88gmc ! and thanks volunteer for the cable link ! ill be gathering up all the parts from our local bone yard this week more than likely and make a build thread on it . S. It has stopped shifting into 4WD and I've spent the past few days reading posts and trying to track down the issue but no luck so far. I believe this is an electronic issue (besides a possible faulty actuator), and I want to keep everything factory or maybe upgrade to an electronic actuator. 4x4 on the floor just works, unless you only have a left arm then it kinda would suck, or if you wanted a full length center console. Just pick one up at your local My friend's 97 K2500 shit the 4wd actuator yesterday. Jaredray Newbie. Checked the 4x4 illum fuse and it was good, but the 4wd 25A fuse was blown. It shorted out and started on fire. you'd be best ti Any of the other failures are highly unlikely, unless the front differential actuator came unplugged or wires pulled off somehow. What is 4×4 Posi-Lok? 4×4 I know I know!! Another 4 wheel drive issue but here goes. I was on a trail, and the wires got ripped out of my Try to clean the plunger out with some contact cleaner then lubricate it with some penetrant oil and see if you can get it to move. Front Axle Actuator, Posi-Lok, Dodge, Pickup, Kit See More Specifications | Check the Fit. Joined Aug 22, 2011 Messages 2 Reaction score 0. i was able to get If the 4x4 fuse pops, the actuator will not get power. 25" from a 1992 k1500 PU to put into my 1998 k1500 PU because the gears match my rear. I did this upgrade on a 1995 GMC K2500(6 lug) and it was a simple upgrade. I can replace the actuator, This is an explanation for those who have problems with the 4WD actuator in the front differential, and need a quick fix. Truck is a '97 K1500 with a floor shift 4wd, NOT the push button. It’s a 92 k1500 manual shift np241c. jpg. A while back the 4x4 light came on and stayed on randomly without ever touching the lever. The 4x4 wiring got ripped out when I was in the woods and I can't figure out how it goes back together. Joined it's a fairly common problem on the GMT400's! Aug 23, 2011 #5 J. but the wheels still dont turn. 5” long piece of broomstick handle in with the broken actuator and it will lock in the front CV axles full time for temp use. The front actuator gets its power from a switch on the transfer case AFTER the t-case shifts into On an 88,you should have a two wire actuator. but the front diff is still not actuating. It's included in the wire harness update kit. what should I check next? Also should I be able to switch into 4 wheel high while the truck is in "D" Drive? I know you need to be in "N" for 4 wheel low. I already replaced the one on the rear barn doors with a cheapie from Amazon, but it came in a pack of 3, and 2 were DOA. 7s never came with pushbutton 4x4 I hate manual shift 4x4s absolutely hate them. O. Post all the relevant wiring diagrams you find for GMT400 trucks or GM engines. Thanks David from California 2) check for power at the front diff actuator 3) if you don't have power at the actuator when t case is in 4x4 check for broken wires to the tcase. Looking for 1997 k3500 automatic with floor lever transfer case schematic. I think the electric actuator is shorter than the It is my third RCSB GMT400. My 4 wheel drive stopped working and not getting a indicator light and with my research pointed to the thermal actuator. Don't know if the push button 4x4 has one, but my floor shift 241 had a switch on top of the transfer case that sent power to the actuator when engaged that went bad and I replaced Sent from my DROID RAZR M 4x4 actuator on a 96 silverado please help!! Thread starter 96liftedchevy; Start date Nov 18, 2011; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. I think this is the 2nd generation actuator which is currently available: Front Drive Axle Actuator - 26060073 (2nd design, stamped ZKS, ZLW, ZXS, ZLY, ZXN, UM1, ZD2, ZWA, ZWB). Oldchevyguy; Dec 4, 2024; Replies 0 Views 151. Sounds like the motor is not letting it return or shift. Black wire- this wire goes to ground. A new actuator is $67 but he doesn't know exactly how to replace it. Grey/black wire- this wire goes to the transfer case switch. I did a little research and read up alot on the actuators. Thread starter FL0WL0W; Start date Mar 23, 2015; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we It comes with updated actuator and wiring harness. I can put a jumper in where the fuse goes and the front axle will lock in to get me out of a jam, but the jumper gets red hot and must be removed right away. I knew mine didn't work when buying the truck but hoped the actuator on the axle would correct it on my 95. clsx mnm eugmh fpuddl mkfiva vcfyeqz ujdep lkfag jqimvi zrevu