Posted by Henry Jacobs on August 06, 1999 at 09:13:20:
In Reply to: wiring harness posted by Drew on August 05, 1999 at 16:49:29:
Get yourself an older book on auto mechanics for a good explanation of auto electrics as they apply to these older trucks. There really isn't that much to it. You can rewire a Power Wagon in a day even working slowly, there isn't that much wiring even with turn signals. I made some changes from the original to include a modern fuse block.
The generator has two wires: field and armature. Arm wire is heavy guage, field wire is lighter guage. These wires just connect to their respective terminals on the voltage regulator unit and those terminals are marked. The third terminal goes to the battery via the starter post and is so marked. I actually put a fusible link in after the starter post and before the fuse block just 'cuz I'm paranoid.
Headlight switch is easy to remove - just back the nut off and remove the pull handle. Panel lights are clipped in by metal tabs, just twist them out. Lights are easy, the sockets typically provide ground so a single wire is all that is required to supply them. Instrument lights have a special terminal on the headlight switch. There is a rheostat in the headlight switch that allows you to adjust their intensity. The ammeter is positioned between the starter post (battery) and the rest of the system except the heater motor which pulls a lot of current and is generally connected upstream of the ammeter for some reason.
HLJ