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Discussion Starter · #1 ·
I just recently bought the truck, and it had a bad 4WD switch, I put the truck in 4WD, and after a little trouble, got it back into 2WD. (The switches lights were blinking irratically, and it didn't want to come out, had to turn it off in neutral a few times and press 2wd to finally get it to engage back into 2wd, in fact the first time, it blinked 2wd and I heard the transfer case move, but then 4hi flashed on, did it again, and it went into 2wd fine) after getting it in 2wd and testing it the old school way, seeing if it would spin the tires, unplugged the switch and rolled on.
That was about 2 weeks or so ago and haven't had any trouble again until tonight, something didn't feel right, so i decided to see if it was somehow back in 4wd, I'd been driving the truck all day, thankfully it was just around town and i didn't exceed anything over about 45 mph. so I went out in my field, and put it in first and gunned it to see if it would again spin tires. It would not. Instead it jumped forward and completely broke my cv axle off of the hog head... Yes, I know, not the smartest way to test things out, but I can't for the life of me figure out why it did that. Why would the truck randomly engage itself in 4wd? I know the switch was bad, but I figured there would at least be some sort of safety precaution to keep it from doing this.

I'm using my second vehicle for the time being, but I'm scared I may have messed something else up by driving it all day. For the record, the truck didn't feel like it was in telltale 4wd, making hard turns I didn't feel awkward front wheel movement or hear tires screeching like they would normally, it didn't jerk taking off or make any weird sounds, but I don't see how I could have busted the cv axle unless it was in 4wd.

Any thoughts on why this thing would do this? I've never in my life heard of something like this happening, and frankly I'm confused.

I plan on plugging the switch back in tomorrow and seeing if 4wd is lit up, but the switch is beyond gone, random lights flicker and it's hard to decipher exactly what the thing is doing..

Thanks in advance.
 

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I would start with replacing the switch. It may not solve the underlying problem, but it sounds like it is clearly defective. Until you eliminate that problem in the system, it will be hard to locate any further problems. I don't think the switches are hard to replace or too expensive either.
 

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Discussion Starter · #4 ·
esox07 said:
I would start with replacing the switch. It may not solve the underlying problem, but it sounds like it is clearly defective. Until you eliminate that problem in the system, it will be hard to locate any further problems. I don't think the switches are hard to replace or too expensive either.
I went ahead and ordered a new switch last night, it was about $30 on eBay. I also "fixed" my cv axle last night as well, and by fixed, I mean I pulled it out and took a hammer to it and rebolted the head of it back to the wheel hub to keep everything in place, then I plugged the switch back in, and sure enough, it was saying it was in Auto 4WD (not exactly sure how correct it is saying this morning I cranked it up and no lights were illuminated, then leaving work today when I cranked it up, it said it was in 4Lo) but nonetheless, I got it back in and the switch is staying plugged in, and it hasn't tried to do it again. I'm really hoping it was just an operator error and that the only thing bad is a switch. I don't necessarily have the money for a new torque converter or to take it to a 4WD specialist and get it looked at.

I'm fairly mechanically inclined, but don't know a terrible lot about the electronics of 4WD, I know I have a switch, actuator, and some other switch thingy on top of the transfer case but after that, I'm out.

Wish I would have continued looking until I found one with 4WD on the floor...
 

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Discussion Starter · #5 ·
So I got the replacement switch in today, aaaaaaannnnndddd nothing. No change, I don't even think my old switch was bad. It lights up like it's supposed to when you crank it up, then nothing, just stays off. no light or anything while the trucks running, won't change into anything either, thankfully it's still in 2WD, but now I'm even more confused.

I do have a service 4WD light on my dash though.
 
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