has anyone experianced this in a 2002 chevy 2500HD ext. cab?
When I use power windows, seats, high beam while driving the truck, All electrical power seams to go. All lights on the dash come on..air bag lights security lights info lights and gas gauge goes to E. Once I stop using whatever the cause, everything comes back. Took to dealer and had new body module and new fuse block put in. had to unplug 4 wheel drive because when power lose happens, throws me into 4 low. been driving without 4 wheel drive for 8 months. Runs great till I use power something...Help
Sounds like you have a ground problem. Clean all of the ground connections you find including where the black battery cable connects to the engine block and the ground that is on the drivers side under the cab on the frame about where the drivers door opens. You can clean them all at one time or clean one and try your accessories to see if the problem went away then tf you have the problem again you will know where to start.
Use a dvom to test the voltage on every single fuse while the key is on. Every single fuse should have battery voltage or nothing. No in between. I am NOT having you test for a bad fuse you are testing the ignition switch.
The only ground those items share is at the negative battery terminal. If that was loose the truck wouldn't start.
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