F 150 Heritage 4WD Pickup V8-5.4L SOHC VIN Z Bi-fuel (2004)
Power Mirror Switch: Testing and Inspection
Switch - Exterior Rear View Mirror Control
SWITCH - EXTERIOR REAR VIEW MIRROR CONTROL
Measure the resistance between the given terminals while pressing the switch in the requested directions.
If the resistance is less than 5 ohms in each direction, return to the originating pinpoint test; otherwise, install a new switch.