There are actually four switch contacts in the switch. Two are used in one direction and the other two are used for the other direction. They change the direction current flows through the motor. If the motor works in one direction, the motor and the wiring are okay. If the switch had a burned contact you would not be able to pull the window up. You can get a clue by watching the brightness of the dome light with the engine not running. If the light dims a lot more when running the driver's window than any of the others, it means it's drawing a lot of current from trying to get the sticking glass to move. If the light barely dims, there may be not enough current going to the motor which will cause it to be not strong enough. The switch could also be a suspect for that, but you might get another clue by listening to the heater fan, again, with the engine not running. If the fan slows down noticeably when you try to run the window, suspect the contacts in the ignition switch. Actually, you could have an accessory relay under the hood that could have pitted contacts. 2000 models use the ignition switch contacts. 2002 models switched to the newer design that uses the relay. I'm not sure which system the 2001 model uses.
Monday, March 21st, 2011 AT 1:54 AM