Passenger window won't go up. I tested the connections at the motor. When the switch is pushed down, I get power to the purple wire and the brown is grounded, like it should work. When the switch is up, I get power to the brown wire, but the purple is not grounded. I have an extra set of switches, but replacing them makes no difference. Does anyone know where this harness is grounded? Or other ideas I should pursue?

 

Window motor.