Ever since I bought the T 3 years ago the RR window would roll down but not up from the master switch, really don't use the back windows so I never got around to diagnosing it. Since I had the steering rack out and was waiting on usps I figured I would track it down. Do the easy stuff first, checked the master switch, all good sending up and down signals, checked the door switch, receiving down but not up, so ruled out the regulator motor.
Pulled the B pillar trim and disconnected the door harness to check signals, both up and down received, ruled out bcm so likely a short. Pulled the door panel and wire harness out of the door to have a look see.
Looks like this might pose a bit of a problem.
Apparently the harness was installed too tight against the door check bucket and eventually rubbed through. A little solder, shrink wrap and reattaching the harness clips to provide more slack where needed and all good. Must have been a monday morning at the factory. As these things age I tend to keep a 'cheat sheet' of sorts with the service books for known quirks or oddball issues like this to reference when I have an issue or people stop by with one.
Pulled the B pillar trim and disconnected the door harness to check signals, both up and down received, ruled out bcm so likely a short. Pulled the door panel and wire harness out of the door to have a look see.
Looks like this might pose a bit of a problem.
Apparently the harness was installed too tight against the door check bucket and eventually rubbed through. A little solder, shrink wrap and reattaching the harness clips to provide more slack where needed and all good. Must have been a monday morning at the factory. As these things age I tend to keep a 'cheat sheet' of sorts with the service books for known quirks or oddball issues like this to reference when I have an issue or people stop by with one.
