ok i dont own this. one of my customers at the auto parts store is having trouble with his blazer. he doesnt have a pc so i told him i'd research it.

he said just yesterday all of his dash lights went out. he made a left turn out of his job and the horn started beeping.all the fuses and relays are fine. and every time he pulls his 4wd lever the radio goes out? im a bit lost on this.
i told him it sounds like a wire is grounded somewhere. any ideas?

 

I would inspect the wiring harness for signs of wear (abrasions, cuts, pinches). Wiring faults of this nature are very difficult to isolate.

 

Look for a bad ground.