Power Window Switch: Testing and Inspection

1. Test the master switch as follows:
a. Remove the switch from its mounting. Turn the ignition switch to the "ON" position. Leave the wiring harness connected to the switch and connect a test light between the TN wire and BK wire.
^ If the test light does not come on or is dim, check the circuit breaker and the wiring to the switch.
^ If the test light comes on, go to step 1b.

b. Move the master switch through all window positions and check for power available at the proper wire terminals:
LB left up
WT left down
BR right up
VT right down

^ If the power output from the master switch is incorrect, the master switch is defective.