Have you ever split and cleaned the wiring block on the firewall? I have seen strange issues because of dirty contacts in this connection. Whatever GM used as a lubricant at the factory turns into a black tar. May not fix your issue but worth looking at.
Have you split and cleaned the electrical block on the firewall? That block is actually three wiring harnesses, the rear lights is one of them. The "grease" GM used turns into a black goo that sometimes a causes issues
In the CUCV Helpful Threads sticky I posted a list of all the ground wire locations I had found in the wiring diagrams. You might take a look at it.
It has been awhile since I looked at the diagrams. From the -34 manual diagram E-7 you will find the 6 conductor connector just under the Ignition switch. That pin has nothing in it.
Now you have to go to diagram E-22 to find the same connector on the left side of the diagram. That pin has the...
Barrman it was great to see you the other day during the Covid event.
For those that say this thread should be in the "modified" forum, yes it probably should, but it was started by me before there was a modified forum and thus that is why it is in the regular forum. If the admin wants to move...
The salvage yard in OK is:
Eagle Iron Metal, LLC
Marlow, OK 73055
When I stopped by there a couple of years ago they would only sell whole units, They bought a dozen or so. Not sure if they still have them.
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