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Comments
The truck has the 4WD shifter on the floor (no push button nonsense), no service 4x4 light going on.
The issue:
Four-wheel drive not working. 4 low, 4 high, nada. Indicator lights for 4wd not working as well (even though the bulbs are fine).
Checked fuses, checked front actuator (it's an electrical actuator).
The thing is, the front actuator works. The piston will extend / retract like it's supposed to when switching from 2WD to 4WD, (with the key switch on) however: As soon as you start the engine the actuator piston retracts and stays retracted... hence no 4WD. Tested with an indicator light in the socket and it works as intended, on with key on, off while cranking, and back on again once running... the actuator on the other hand... not so much so.
I'm thinking about putting it into 4WD then disconnecting the actuator so that it'll be 4-only to be able to at least plow snow with it for the winter. But I'd rather fix the thing correctly.
Can anyone tell me what the problem is?
Otherwise your actuater is most likely junk, mine was junk but didn't work at all, it may work when no pressure is applied but as soon as you put it in place with all the force against it, it may fail to work properly. Try replacing actuater with new one and I'm sure this will solve your problem as long as your wiring harness is good and not all burned up. Good luck
I heard the 1986 Chevy 1500 short bed was the lightest, but,,,can't verify this via LOTS of Google searches.
Can anyone point me to where to find "vintage" truck curb weights ?
The vacuum lines must be put back CORRECTLY for the 4x4 to work !! There were 4 vacuum lines on my Dodge with the 241 New Process transfer case (same actuator as on the 231 t. case)
Check the vacuum lines for cracks, splits, holes, wear etc. and as you said, the fuses. Check all these. The electrical actuators, on axle and transfer case, were both around $15 ea. so I replaced both. Check all these again and see what happens.
1. Looked for a blown fuse. I only found one fuse that said FWD, and it was the one on the inside of the cab. Looked good. So that wasn’t it.
2. Changed the selector switch. You know the push button thing, in the cab. This wasn’t it either.
3. Changed the actuator. Nope not it.
By this time I was not too happy; therefore, I did the unthinkable, I took it to the Chevy Dealer. After all having a FWD truck, but the FWD doesn’t work, just don’t seem right. Kinda got my feelings hurt when they said “$100.00 dollars an hour.” No thanks. So, I did without the FWD last winter. Luckily, it wasn’t a bad winter.
So, before this winter, I was bound and determined to get it working come hell or high water the things gona work. After replacing all the parts last year and it still didn’t work, I knew it had to be electrical.
I found a web site that has all the electrical information for my truck or any vehicle for that matter. It’s called alldata.com. Granted, I did have to pay like $25.00 for a year, but I did it anyway. And, low an behold, there is a fuse. It’s not labeled FWD, its labeled ATC. (Automatic Transfer Case) It’s under the hood with all the other fuses. So, I don’t know what the actual problem was or how the fuse got blown, all I know is after doing all the steps above and replacing this fuse, it’s working. I just had to try them all, I guess. Good Luck!!! And thanks everyone that posted on here. IT WORKED. I don’t know which one done it, and don’t care. I got my FWD back.
If there is anything we can look into for you (warranty/recall questions, follow up on an appointment with a dealership), we can be reached at socialmedia@gm.com (include a brief summary, the last 8 digits of your VIN, and your name and contact information).
Sarah, GM Customer Service
Did you ever get this checked into by your dealership while it was under warranty?
Sarah, GM Customer Service
I didn't see this issue posted. My 4wd must stay in Auto 4WD. If I put it in 2H it goes thru the gears and when it hits 4th gear it drops to neutral. I am unable to drive in anything other than Auto 4WD. The last time I used the 4WD function was approximately 5 months ago and I don't recall putting it in Auto 4WD. I have very little call for the 4WD but I like knowing I have it. I recently went from NM to KS without realizing it was in auto 4WD. That was when I found that
the 2H wasn't working. Any ideas? I am unable to locate the ATC fuse that one message discussed. Not even sure this would fix the problem
I am experiencing an absolutely identical problem (with an identical truck) to yours (mine has 80K miles). I am therefore keenly interested in what you may have found out. The local chevy dealer has suggested over the phone that my transfer case had been run without oil perhaps, and that simply was NOT the case, it is full of clean oil with no burned smell or other signs of neglect. Now he wants me to bring the truck into the shop and start emptying my pockets so to speak @ $75/hr.
Can anyone help me out with advice?
It all started a few days before the end of October. I called Sirius to extend my subscription for "music channels only" (I don't listen to sports or news on satellite radio) and for "traffic" and "weather" services. I use weather more than traffic, but the forecast and weather maps I can access in the Mercedes show weather fronts, wind speeds and direction, rainfall and severity, storms, lightning, etc., and the info provided is extremely accurate, not to mention picturesque! Sorry for digressing. The first 8 idiots I spoke with on the phone (yes, 8 times I called to get this completed) over the 2 week period said I could subscribe to "music only" and "traffic", but that my radio and internal computer in the car could not support "weather" data! Now remember, for 6 months, I was able to easily access traffic and weather as well as all channels. Now, I guess my radio (Harman/Karmin) just won't accept the data they would send for the weather maps and forecasts!!! I state to them all, "YOU ARE NUTS!" Then, they want to charge me an activation fee on top of that.
After 8+ attempts, I decided to surrender and not bother with Sirius or their services - let's face it, doing without satellite radio and weather and traffic is not the end of the world. But when I was up at the Mercedes Dealership yesterday, they told me the E, S, CLS, and 95% of their cars support weather from Sirius. So, I tell myself, "...what the heck", and I try again this morning. I had to call them 4 more times until I finally got them to transfer me to a supervisor who spoke the King's Language perfectly. I explained the situation to him, the fact that I had been a customer for over 9 years, and that everyone I talked to at their company had no idea what I was talking about. He apologized, looked up my account, and told me that my car could accept the "data" plan they offered which includes traffic, weather, stocks, gasoline prices within 50 miles, etc. I took a deep breath and thanked him.
So, I signed up for "music only", "traffic", and "weather" through their data plan for 1 year at a cost of $229.00 with 3 months free and no activation fee. That's $15.27 a month for 15 months. At full price for the plans, it would have been closer to $350.00 a year.
I know Sirius subcontracts their phone services to some other country, but at least their supervisors are located here in the U.S.A. You would think that a "monopoly" company (no other competitors for satellite radio services) that sells a service for music and other data in the current business climate whereby they actually compete with AM/FM HD radio stations, iHeart, Pandora, and now even Apple internet radio, Bluetooth connectivity to smart phones, MP3, iPods, not to mention CD/DVD 5.1 surround sound, to name a few, would do almost anything to maintain a positive client relationship - not to mention subscription renewal process!
Why should it take a customer almost 3 weeks and over 12 phone calls to finally get to speak with someone who knows what he/she is talking about? I wonder how long XM/Sirius will be able to continue selling services with their current approach to customer service and consumer relations?
2021 Genesis G90
Still not solved. Local mechanic with top-of-the-line code reader/scanner could find no trouble codes. Chilton's manual is no help either, though it gives a good description of how the 4wd system is supposed to work. I'm hesitant to start replacing components in a hit or miss fashion. Can anyone offer advice?
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Look in the engine bay fuse box find the fuse called Etc if your truck does not have the Atc fuse like mine doesn't. I replaced the 4 wd selector switch on Amazon for 30 bucks as mine was bad. Then I looked for the ATC (automatic transfer case) fuse but couldn't find it I then found ETC fuse (electronic transfer case) pulled it and sure enough it was blown. Replaced it got iny truck started it up and all my lights were back on (on the 4wd selector switch) I found I was in 4hi. Put truck in neutral Pushed 2hi and bam it changed then tried all settings out works like it used to good luck