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I haven't had a problem with mine yet so I don't have
experience, however...
Looking at the schematic (E12S anyway), the lift motor has two
windings, forward and reverse. So I imagine the problem is one of:
1. Bad winding on the lift motor
2. Bad connection at lift
3. Bad connection at switch
4. Bad switch
I find about 80% of electrical/electronic problems are bad
connections, so I'd start with those. They are also the easiest to see and
fix.
BTW, while on the subject, I understand that the lift motor is
a window motor from GM? Does anyone know what models, years, and which side (if
it matters) one would ask for at the junkyard? Since I imagine it's 70's
vintage, those cars may be all be gone soon (scrapped), so it may be good to
salvage some while we can.
- SteveS
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