Question about Chevrolet 3500

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The 4x4 fuse keeps blowing when i shift it into either 4low or high any sugestions.

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I would disconnect the electric actuator motor at the transfer case for the 4 wheel drive and see if the short goes away.

Posted on Dec 15, 2008

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My atc fuse would keep blowing I put a bigger fuse it didn't blow that but I herd a zap noise from my TCCM now my 4x4 won't work 1999 jimmy


What you have done? You Just damage the TCCM and that's why you will not manage to shift 4x4. Why this happened? Because you had shortage somewhere and you receive blown ATC fuse.You put a bigger fuse in capacity where the was stronger to blown and the fault moved to the tccm system which was not protected and blown.Ask for an expert to check and see whether the fault is easy to get fixed.

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My 4x4 fuse keeps blowing. I put in a new one, shift into 4 wheel drive and it blows. Is it a short or could my 4 wheel drive be out. It is a 1994 chevy suburan.


Try this,on the front axle there is an actuator for the 4x4,unplug it and try to engage 4x4 with it unplugged,if the fuse doesn't blow,actuator is bad.
Also look at the wires going to the actuator they get damaged from brush and things.

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I have a 93 chevy z71. I can't get the auto locking hubs to lock. My transfer chase works. But when i try to shift it into 4hi or 4low the 4x4 fuse in the fuse box will blow


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1 Answer

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1 Answer

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2 Answers

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Hi ..i had the same same problem in my k3500,check 4x4 fuse first .if thats blown replace it if blows when you put in 4x4 go under the car and unplug the actuator at the front diff.go back in the cab and put another fuse in, shift into 4x4 if the fuse does not blow this time you will need a new actuator.
thats what happened with mine and now 4x4 is sweet.i thought mine worked to at the start until i got bogged and noticed my front wheels wernt turning.

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1 Answer

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