Posted by Garrett on April 25, 1999 at 10:50:43:
In Reply to: 1979 D150, M880 PowerWagon w/225 slant 6 posted by Ted Newell on April 23, 1999 at 06:56:04:
I have a 77 w-100 and the wiring diagram that I use is the one in the hanes manual. It is farily complete and covers your truck well. I also have older manuals from when the truck was new and the diagreams are the same so I am pretty sure they are accurate (they better be- I have to put my wiring back in my PW). Have Fun