I'm trying to straighten out all the wiring on my '71 G10. The original wiring is there, but over the years it has been hacked and parts switched out so now trying to find a detailed wiring diagram with included components locations so I can straighten it out. Part of my problem is when I search online I find diagrams, but not sure if they are specific for 1971. I have the 1971 repair manual and an older Chilton, and I found some diagrams on the O'reilly website. I also have some electronic components that are not plugged in to anything at all, like a relay by the parking brake, and on the upper bottom of the steering column I have a bunch of contacts with nothing plugged into them. Any help?