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petdave -> RE: help w power window? (5/21/2008 6:42:08 PM)
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Here is the style of regulator you're dealing with- old-school, heavy duty.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=170220988175
Okay, basic power window troubleshooting-
If none of the windows work from any of the switches- fuse
If you can operate other windows from their own switches, but not from the driver's switches- either a bad switch bank, or a broken wire somewhere between the fuse box and the door.
* Check to see if you have power and a good ground coming into the switch bank (make sure you turn ignition on to test). If
you do, the switches are bad; if not, the wiring is bad.
If the other windows operate from the drivers switch bank, and only the driver's window is stuck- does it make any noise when you try to operate it? Listen to it with the engine, radio, etc. off so that you can hear if there's a hum.
* If not, the motor is either completely seized, or the switch is bad. Hit the switch and see if the dome light dims
**If the dome light does not dim, either the switch is bad, or there is a wiring fault between the switch and the motor
**If the dome light does dim, then either the motor has seized, or mechanism has become jammed. Since you're in Pennsylvania, take the inner door panel off and see if the thing has rusted solid.
* If you hear a hum, whining, or grinding noise, then you've had a breakage in the gear drive somewhere. It's not very likely with this style of regulator, but it can happen. See if you can help the window up with your hand while the motor runs. The entire regulator assembly will need to be replaced. This is a pain in the ass job, and in some vehicles can even require drilling holes in the door, or cutting off a section of the inner door skin.
* If you hear a click or a thump, the motor is no longer producing enough torque to move the window. Open up the door, and see if the window has slipped the track, or if there's some kind of obstruction. If you can get to it, stick a multimeter on the motor terminals and make sure you're getting 12 Volts. If not, failing switch, take it apart and clean it, or replace it.
If everything looks okay physically, and the motor is getting 12V and still not turning, then you can probably get away with replacing just the motor. This may or may not be easier than replacing the whole assembly, depends how it's set up in the door.
On the plus side, it doesn't look like the Lumina uses a spring counterweight to help the glass move up... those things friggin' scare me.
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