I picked up a set of power window doors and the body harness to add on my non PW van and I am having issues with testing them out. I came up with a PW motor pigtail and checked and the left door motor is probably bad, no action. The right door motor works, but not off either switch, even when it's hot at the connectors. I did pick up a second switch to try but haven't yet.

In this old thread there's a diagram and if I read it right, the right side will not work without a functioning left side master switch?

https://chevroletforum.com/forum/exp...-issue-100806/

The wiring matches up to what I have here. I do need to sit down with a meter and continuity check everything. I wonder if I can jumper ground from black to tan on driver's side and get ground to the right hand side.


The locks also have some issues. 1994 has an electronic relay which seems to work, the right side door will only unlock however. The left side, nothing, but probably the solenoid is also dead. What I don't understand is why the right would only unlock. Seems like it should work both ways. FWIW, 94 power lock switches are different from older ones, the pin arrangement changes, although they look the same otherwise. Thinking by 94 vans were the only ones left using the old style chrome switches.


If one is doing this conversion it's not hard, aside from the donor needs the dash pad pulled so you can remove the harness section. On the ones with a mechanical relay that bolts on under the dash and it has to be grounded well to work on the receiving vehicle (like 1991 and back). But you can slip this wiring in without pulling your own dash pad if you don't want to. Each side has a flap covering the lower door hinge bolts, remove this and you don't need to drill a hole in the inner cowl to connect the plugs. My 94 has dimples in the door jamb for the holes for the wire and to attach the rubber sleeve. A HF step bit would do the honors for the large hole. The only thing I ran into is the donor also had keyless entry and the wires that run that go elsewhere into the harness to points unknown, they just got clipped off as I see the unit itself has problems with bad solder joints and there was no key fob present. If you had a wiring diagram for the keyless system it might be possible to remove enough from a donor to make that work.