I have a 81 911 SC Targa with pwr. windows. My problem is the pass. side window works from the driver side switch but not the passenger side switch. I have replaced the switch and still nada. the motor operates and I have checked the schematic and it appears to be wired correctly. Any one have any suggestions or run into this before???

 

It might be the wires in the harness that come through the door into the body have fatigued and broken. Check for current at the switch.

 

i have a failing problem that is similar then i noted a wire exposed in the door hinge area...same symptoms...whenever the ground wire hit hte metal door... it would not work from the passenger side.