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Before
assuming that your car has a defective motor or regulator,
a few quick checks are in order. First verify that
the fuse or circuit breaker for the windows is OK.
Most cars use the same power circuit for all of the
windows, so if only one of them isn't working, it's a
pretty safe bet that the fuses are OK.
The car
we're checking out is a 2002 Pontiac Grand Am 4 door
sedan. We'll be looking at the drivers side (left) front
window. The cable mechanism used in this vehicle is
typical of many late model GM, Ford and Chrysler vehicles
as well as most Asian imports. These systems are
light weight, extremely adaptable and inexpensive to
manufacture making them the system of choice.
Unfortunately, high reliability isn't on the top of this
list.
Tap the
window switch for the bad window and carefully listen for
motor noise, etc. in the door. No noise may mean a faulty
switch, motor, regulator or wiring. A motor whirring or
grinding sounds may indicate a faulty regulator. In
either case, we need to pull the door panel and do a
little investigative work to be sure of the fault.
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