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Re: It blows the 4x4 fuse when in 4x4 and i put it in...
If you have the electrical type of 4wd system it could be anything from a bare wire to a faulty transfer case switching motor. You should have a qualified Tech look at it.
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park lock out failures. so connector for them not connector or loose.
or brake lights dead causing same
or fuses blow
step 1 is pull neg lug on battery do that? to work dash and not eat and SRS air bag for lunch> nor blow fuses.
Sounds more like you have a wire that is grounding out and causing a short circuit. I would do a close visual inspection of the wiring and look for any chaff or rub spot.
On your gear stick in the plate u have a switch the allows the signal to go to ur dash boar . Is wear out. Need to take a part. And tape or use other means to ground it off. Is shorting out.
Odd that your vehicle runs both systems on the same circuit and with only a 10 amp fuse. I'd try a 20 amp fuse to see if that works. Worth a shot, it shouldn't harm anything.
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.
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.
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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