I don't have power going to my switch for the wipers or wiper motor my fuse for the wiper's is fine. what color wire is sabose to have power to it. I have 2 black wires 2 grey wires 1 pink wire and 1 purple wire. 1979 and 1980 chevy truck wireing are the same. I have a Haynes manuel but the wireing diagrams suck.
Ok, well, my diagrams only go down to 85[img]images/icons/frown.gif[/img], but in that year, the pink wire is the +12v going to the windshield washer pump itself from the switch. Your two black wires will be ground. Purple is the Hi speed positive going to the wiper motor itself from the switch. Grey is the Lo speed positive going to the wiper motor itself from the switch. I don't know if this is going to apply to your year, but it's the best I have. Heres what I have anyway: