Rear lights wiring harness issue

[HIGHWAY BY THE SEA]

This electrical issue still has not been fixed yet due to me concentrating on other things with this truck. It is coming along overall well in other areas, but I cannot believe how many electrical problems that have popped up.
I lost all dash lights after I got them working so well (even the heater switch light), the horn never worked with the horn button; only with a "jumper", and now it does not even work with that. Still no signal lights, brake lights, inner-cab light, or license plate light. At least I got the cigarette lighter and plug fully operational so that I can charge my cell while working on it outside.
I am SERIOUSLY considering replacing the entire fuse box since there is visible rust on the metal contacts. The wires all seem OK though. I have just about decided to have a professional mechanic fix this issue, because I have gotten NOWHERE, and am sick and tired of dealing with it.

[Bonestock3ott]

Not much to the wiring systems of these trucks, if your ready to pay someone to repair would you not be further ahead and have a sense of accomplishment by installing a complete new harness yourself from one of the many companies that produce them?

[HIGHWAY BY THE SEA]

Originally Posted by Bonestock3ott

Not much to the wiring systems of these trucks, if your ready to pay someone to repair would you not be further ahead and have a sense of accomplishment by installing a complete new harness from one of the many companies that produce them?

I have certainly considered that, but the sheer PRICE of those new wiring harnesses is probably more than a mechanic would charge for fixing it.

[Bonestock3ott]

So a quick search shows a complete harness for about $540 . Around me with labor rates between $85 to $100 per hour, I think I would have that amount into having an old problem prone electrical system repaired. I think it would be money well spent on the harness and investing a couple of days installing the harness myself. Just my opinion. Good luck however you choose to fix . Price www.tuckersparts.com

[gmc684x4]

The price of a new harness is piece of mind your truck does not burn down from 50 years of wear and tear and improper repairs done over the decades

crimp splices , wires twisted and tapped together are not as good as heat shrink and a clean solder joint for connections

Lack of clean grounding is most likely part of your issues others have mentioned it before me

Brothers and other places have Nos style harness kits buy the pieces you need today and buy other parts as needed

the fit factory harness like the originals did

https://www.brotherstrucks.com/69-72...tinfo/WH22075/

[HIGHWAY BY THE SEA]

Originally Posted by gmc684x4

The price of a new harness is piece of mind your truck does not burn down from 50 years of wear and tear and improper repairs done over the decades

crimp splices , wires twisted and tapped together are not as good as heat shrink and a clean solder joint for connections

Lack of clean grounding is most likely part of your issues others have mentioned it before me

Brothers and other places have Nos style harness kits buy the pieces you need today and buy other parts as needed

the fit factory harness like the originals did

https://www.brotherstrucks.com/69-72...tinfo/WH22075/

Thanks for the assist!! The problem has been fixed though! See the New Project link in my signature (pages 4-5) for all the details!