Thanks. I found a website that had some good info for a Porsche 944, but it looks exactly the same so I followed the procedures and this is what I found:

With Ignition ON:
Red/Green wire: 12V
Blue/White wire: 12V

On motor wires --
Green (+) wire 12V without pressing switch
Black (-) wire 12V without pressing switch

There are 0 ohms when I checked resistance between the green and black wire.

Also, the cable that goes UP is as tight as a bowstring, but the cable that goes DOWN has slack. Is that normal?

With my hand on the motor, I can hear it click when I press the switch, so the motor is getting power it seems, but nothing moves up or down. Same deal when I used a 12V/18V battery.

Any ideas?

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