94 K1500 blowing 4wd fuse on startup.

[CanadianNorth]

Hi Folks,

I'm guessing this is a short somewhere - but I wanted to ask for help as it sounds different than most things I've read about 4wd and fuses.

The truck is a well maintained 1994 K1500 4.3L with automatic trans.
The 4wd blew a fuse a few weeks ago, I replaced it, and all was good. A few days ago the same issue happened, but she keeps blowing fuses.

Reading up on things, I disconnected the 4WD solenoid/actuator in the front differential, hoping that was the issue. But the fuses keep blowing.
I also realized today, as I looked for worn wires down around that connection, that as soon as I turn the ignition key the 4wd fuse will blow, before I even try to put it in 4wd low or high.

Any suggestions on this one? I have a haynes manual for the c/k 1500 series but it doesn't have any wiring schematic for the 4wd system that I can see.

thanks

 

[df2x4]

You may want to check in the '94 GM factory service manuals. They're usually a lot more specific and complete than Chilton, Haynes, etc. You can download the '94 GM manuals here for free.

https://www.gmt400.com/threads/88-98-service-manuals.43575/

 

[CanadianNorth]

Thanks!

i'll take a look

 

[firestoness]

That circuit goes to the transfer case too. I also remember a loose spade connector in the far back corner of the engine compartment by the brake booster that isn't connected to anything. Make sure that isn't touching metal