D 250 Pickup V6-239 3.9L (1989)
Power Window Switch: Testing and Inspection
Power Window Master Switch Continuity
To test the the left power window switch remove the switch from the trim panel and remove the wiring harness from the back of the switch. Using an
ohmmeter, check for continuity through the proper pins in the indicated switch positions. If the continuity is not correct, replace the switch.
Passenger Power Window Switch Continuity
To test the right power window switch, remove the right switch from the trim panel and remove the wiring harness from the back of the switch. Using an
ohmmeter, check for continuity through the proper pins in the indicated switch positions. If the continuity is not correct, replace the switch.
