The power windows circuits are controlled by the Body Control Module (BCM) have it self tested for proper function.
SOURCE: 2000 pontiac bonneville SLE
Its a signal wire splice that is under your driver seat carpet.( 4 brown wires)
SOURCE: No power to drivers side window switches. Checked
check the wires in the rubber boot from the door to the car body
SOURCE: 2005 Chevy Colorado drivers side window, and power locks
Check for door ajar switches not making contact.
SOURCE: door locks and power window
Just did this procedure I got from coloradofans.com forums:
"any type of power/voltage change
seems to trigger this issue
The most common symptom is power
locks fail and only the driver window quits, however that is on the
extended cab.
Steps to fix and it works every time.
take
door panel off driver's door
Disconnect the wiring attached to window
and power lock control unit
disconnect battery cables
connect
the negative to the positive cable(((NO BATTERY CONNECTED)))
This
will act to short residual voltage in the system
5 minutes later
place
the key in the ignition and turn to the run position
connect the
wiring to the window/lock controller
connect the negative cable to
the battery
then the positive
open drivers side door
turn key
to the off position((do not remove yet)) you should get a series of
dings through speakers telling you the key is still in the ignition
once
it begins dinging pull the key out and you should hear the door lock
solenoids trigger and the windows should work." - Coloradofans.com forums
SOURCE: 2000 taurus all windows stopped working replace 1
Yes I would think the loose wire in the back of switch would have a lot to do with the problem because from that switch the power for all the other windows is controlled from that switch. If you cant find a way to tighten the looses wire you may have to replace the whole switch unit.
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