Ok, went thru tons of posts, tried a bunch of things and still beating my head against the wall. '88 Monte Carlo SS ...New switches, and a new motor on passenger side...Every wire at the switches light with a test light at the proper time. The test light lights at the passenger switch when the master is operated. The test light shows power at the proper time at the motor connections. The master switch is the ground for the whole sytem, so on the chance of a bad ground, I cleaned the ground connection, and then added a new chassis ground from the switch to the body (not the door). All indications by test light is everything is perfect, but neither window will go up or down. What am I missing?