OK,

So like a good board member before going out and installing my gagues I printed the high res version of the cab wiring diagram in the sticky on this forum. I went to my truck and thought, this is odd, not everything lines up. Sure enough, my wires did not match it much at all. Has anyone else run into this? I have a 70 CustomCamper C-20, 350, auto, blah blah. Anyway, let me try to explain the ones I have figured out...

left---------------------------right
__________________________________________
Black/white-12V+--------------Black-?
Brown -fuel ?------------------Lt green-Hi Beem
Red-?-------------------------Lt Blue-LH Signal
Brown-Fuel Sender------------Dk Blue-RH Signal
SPACE------------------------Grey- ?
Green-?-----------------------Black-?

This also had numers on the plug, 1-6 going down the left side, then 7-12 going UP the right side. This is much different then the gif I downloaded. Can anyone help me make sure I have this right, and does anyone else have this setup? One last thing, not sure if this matters, this truck had the 3 small gagues, NO tach.

Orlando

Sounds like you are doing the guage conversion. I dont know what diagram you have , but here is what gmcpaul has. scroll down. also here is a pic of where the new wires go.

http://www.gmcpauls.com/Tech%20Tips1.htm

John,

I was looking at the sticky at the top of this section, turns out it was for the no gauge setup, thanks so much for the link, it helped a ton!

Orlando