This is the situation: On my '79 Z28 neither of the power windows worked when I got it. I found the switch (in the console) was bad, jumping it made the passenger side work. But not the driver side, just sparks.
So I did these tests: I pulled the driver side regulator/motor assy. Before plopping down the big buck$ for a new motor, I tried it out of the car, in case maybe it was just stuck linkage or something. It worked OK, fast in the direction the spring was helping, slow in the other. The motor windings checked at about 1 ohm. I used a battery charger to power it, and put a voltmeter on too. The battery charger pegs out at 10+ amps, while the voltage drops to around 7-8 volts, at the motor. So I wondered, what does the other motor, the one that works, do? I made the same check, and found the same result. It goes down fast, up slow, and draws 10+ amps at 7-8 volts, that is at the switch.
Here are my questions: Are either or both motors bad? Is that why the switch went bad? Is it common for these power window motors to draw way too much current, but still work? How much current should they draw? I checked the fuse box for a clue, it seems the "power accessories" are run by a 30 amp circuit breaker, not a fuse!
If the motors are bad, it seems like taking a chance on junk yard replacements would be a bad idea, same for the switch. I see the motors at Year One for $120 each, Classic Industries at $140 - $160 depending on which side (?!?), and Paddock at only $70 (well, maybe my catalog is a bit old, but that is a BIG difference). Is the quality the same? The switch seems to be in the $60 - $80 range. Could I get the motor rebuilt somewhere for less than a new one? Any other ideas for reasonable cost sources?
And my last question (for now) is, the connector to the switch is shot, melted around the terminals. Iwould like to replace it (as a pigtail). Bit I can't find it! Any ideas? Or should I just cut it off and solder the wires to the switch (yuk).
All responses are deeply appreciated! Thanks!
now: '73 LT; '79 Z28
then: '67 coupe; '88 IROC; '95 Z28
[This message has been edited by ibjoe (edited 06-05-2001).]