Chosen Solution
My rear left window goes down without a problem but won’t go back up. I can roll it down with both the drivers master switch and the switch on the rear left door itself but neither of them can roll ot back up.
the wire going to the up part of the switch is the problem. the motor takes at least 3 wires. this way it can reverse the polarity to change direction. trace that wire and check it has power when depressed for both directions with a volt meter or 12v light pen.
