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Re: No power to cab
Pretty sure that power comes to the cab from one of the terminations on the horn relay. You might also have a bad ground as well. Funny that I ran across this thread. Just within the last 2 days on the way to and from work, Ive hit the same group of potholes on the freeway. Both days, when I hit them, I lose almost all power to the truck. Dash lights, head lights, the engine cuts out for a split second and then just like that, everything is back on. I thought about it all day at work today and realized that I had removed all of the body to frame grounds during the rebuild. I guessed that when I hit the bumps, whatever was grounding the body was losing contact. A little experiment followed. I made a jumper out of a couple of alligator clips and some #10 wire. Before I drove home today, I clipped one end to my main engine ground and one to a stud on the firewall. I hit the same potholes on the way home today and it didn't skip a beat.
Moral of the story, check all your ground and if you don't have any extra ones from the body to the frame, that could be a part of the problem.
I know what Im doing this weekend.
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