[1tonchevy]

Originally Posted by TheWhiteElephant

Yes, I would check every ground on the truck. There really aren't too many. I had some crazy issues on my taillights. They were working all wacky. I replaced all the switches I could find, and I narrowed the problem down to bad grounds on both taillamps.

The taillamps on my '73 K20 have one ground to the left inner bedside. When I rebuilt the taillight harness, I made 1 ground per side and grounded them to each inner bedside, and then from the same bolt I ran a wire down to the frame and all was solved.

You should have the taillamps ground to the bed, a ground from the bed to the frame, battery (-) to alternator bracket or engine block, radiator support to frame, headlamps to radiator support, firewall to engine head, engine cluster to dash frame, and some others I probably forgot.

One thing I learned in my quest is that if the issue is a crazy one, it is likely a bad ground.

M

ok thanks guys i'll start y seach once i get a nice day out and let you knwo what turnes up