Power Window master switch problem, replaced -> still have problem!?
My '92 Stanza GXE (ka24e) has some electrical problems:
1) Front-passenger window works up/down from passenger switch, but UP-ONLY from master switch.
2) If I try front-passenger window DOWN from master switch, all the lights go dim, the window does not move, and sometimes there is the smell of warm plastic (electrical insulation?). If I persist, there is sometimes a click, after which the window will not go up or down with any switch for several minutes (thermal / circuit breaker?).
3) The power-window lock-out switch on the master switch panel no longer prevents the other three sub-switches from moving their windows UP or DOWN.
I replaced the master switch with a used one believed to be working, but there was no change in symptoms.
I replaced the master switch with a DIFFERENT used one also believed to be working, but still no change in symptoms.
I replaced the front-passenger switch with a used one, and also tried leaving the front-passenger switch disconnected, but still no change in symptoms.
I disassembled the original master switch and one of the replacement master switches, and the contacts all appear clean and the circuit board appears clean.
One symptom I had from the time the car was brand new: If I lower both rear windows all the way down simultaneously from the master switch and not release the buttons immediately after both windows reached bottom, the power locks would all lock. This symptom was somewhat intermittent, but appears to have completely gone away recently. Maybe or maybe not related?
Anyone know how I can isolate the problem and/or fix it?