How to test power window voltage and where to supply power?

[bennylava]

I'm trying to fix my slow passenger side window in my 87 truck. It's slow going up and down, and it often needs a person to help it go all the way up. I have already replaced the window motor and the regulator with new AC Delco stuff. So we can rule that out.

If anyone knows what all the various colored wires do that connect to the passenger side switch, please let me know. I have the Power Probe (if any of you are familiar with that thing) and it can send power through the end. But I'm not one to go sending power down wires that I don't know where they go. Bad idea.

I searched around and I did find this, but I think it's for an 83 model, but maybe it's the same as 87? Anyway I'm not so good at reading electrical schematics. Looks like the passenger side switch is at the very bottom but I'm not certain where to plug in the volt meter prongs to test the voltage.

http://www.73-87chevytrucks.com/tech...werwindows.gif