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1990 Ford Mustang Power Window problem

Tiny
HALFLOOP
  • MEMBER
  • 1990 FORD MUSTANG
  • V8
  • 2WD
  • AUTOMATIC
  • 68,000 MILES
The passenger side power window would intermitently close (up) but never open. I pulled the motor and put it on the driver side switch. Motor was good. Swapped the known good switch to bad side, no change. Here is the weird part, if I open the driver door all the way, the passenger window works. Shut the driver door the passenger window stops. I know the passenger window switch on the driver side has to be installed in order for the passenger window to work with either switch but I have no clue how to start trouble shooting this. It might be in the wiring harness.
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Sunday, May 4th, 2008 AT 9:53 PM

1 Reply

Tiny
MUSTANG87
  • MECHANIC
  • 261 POSTS
Try changing the power window switch it might be bad and not work correctly and also might be the power window relay. One of those 2 is going bad. Go to a junk yard and get those parts to to see if thats ur problem. Any mustang from 87 to 93 works and its the same thing.4 cylinder or 8 cylinder dont matter im not quite sure where th relay is but u can find out at a parts store or mustang forum. Good luck
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Monday, May 5th, 2008 AT 1:31 AM

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