Originally Posted by Armyof1

I have a 92 ram with the Cummins that only has 10v across the ignition wiring anything and everything "key on" only has 10v including the glow plugs PLEASE HELP , COULD THIS BE A RELAY or is there a common issue some one can help me with

Originally Posted by 86Dodgeman

So I think this should be a permanent post. It took me months of scrubbing the internet, but I finally found a set of First gen Wire Diagrams that give all wire color codes for ALL components, unlike Chiltons and other manuals that don't break down ignition switches and so on. I know they are accurate for my 86 for most wires (some components not installed on my truck), and I know the ignition wires match my setup which is what I have been looking for forever. I am not 100% sure how many years they apply to for first gen trucks, but it is better than nothing and should help A LOT of people out on here. I know they helped me more than I can express in words.

Originally Posted by StraightSixList

Will the wiring harness off of an 83 fit an 87 then? I understand some odds and ends may come from small equipment devices . I have moved a straight six from an 83 to an 87. The 87 had a straight six as well. The mechanic said it was a no go?