From: Wally Plumley [wplumley@bellsouth.net]
Sent: Tuesday, February 26, 2002 6:13 PM
To: 928
Subject: [928] Re: [928OC Public List] Power Window Problem - '87S4

At 12:22 PM 2/26/02, NGUYEN, CUONG Q. (JSC-XA) (NASA) wrote:
>My power windows were operated perfectly until yesterday morning when I was
>not able to "roll" up the driver side window (the passenger side still
>works).  I've checked the switch and determined that
>I do have power coming in and out of the switch (I think).  My volt meter
>showed 14+ volts between the red and green wire and
>
>between the brown, black and green wire.  Do you think I could have a
>problem with the motor?  It never showed any signs of hesitation or off
>nominal noises.  I did check the Tips sheet without any luck.  Thanks very
>much in advance for any suggestions.


Most common problem is dirty/burned contacts inside the switch.

With ignition switch on, you should have 12 vdc positive on the red/black 
wire, ground on the brown wire.
With the switch one way, you should have 12 vdc between the green and the 
red/green wires - note the polarity. Reverse the switch - there should 
again be 12 vdc between these two wires, but the polarity should reverse.

If not, it's probably a bad switch. You can sometimes clean the switch 
contacts. If you take the switch apart, do so inside a clear plastic bag, 
so as to catch small flying parts.

Wally Plumley
928 Specialists
www.928gt.com