Power Window Switch: Testing and Inspection

The auto down feature of the driver side power window switch is controlled by an electronic circuit within the switch unit. The auto down circuitry is activated when the driver side power window switch is moved to the second detent in the Down direction. The outputs from the auto down circuitry are carried through the same switch pins that provide the normal down function. The auto down circuit cannot be tested. If the driver side power window switch continuity tests are passed, but the auto down feature is inoperative, replace the faulty driver side power window switch unit.

The Light-Emitting Diode (LED) illumination lamps for all of the power window and lock switch and bezel unit switch paddles receive battery current through the power window circuit breaker in the junction block. If all of the LEDs are inoperative in either or both power window and lock switch and bezel units and the power windows are inoperative, perform the diagnosis for Power Window System. If the power windows operate, but any or all of the LEDs are inoperative, the power window and lock switch and bezel unit with the inoperative LED(s) is faulty and must be replaced.
1. Check the circuit breaker in the junction block. If OK, go to Step 2. If not OK, replace the faulty circuit breaker.
2. Turn the ignition switch to the ON position. Check for battery voltage at the circuit breaker in the junction block. If OK, turn the ignition switch to the OFF position and go to Step 3. If not OK, repair the circuit to the ignition switch as required.
3. Disconnect and isolate the battery negative cable. Remove the power window and lock switch and bezel unit from the door trim panel. Unplug the wire harness connector from the switch and bezel unit.

Power Window Switch Continuity - Driver Side:

Power Window Switch Continuity - Driver Side - Conventional Cab and Club Cab:

4. Test the power window switch continuity. See the Power Window Switch Continuity charts to determine if the continuity is correct in the Neutral, Up and Down switch positions or. If OK, (Refer to POWER WINDOWS/ WINDOW MOTOR - DIAGNOSIS AND TESTING) If not OK, replace the faulty switch.

For addtional testing please refer to Powertrain Management/Computers and Controls/Body Control Module/Testing and Inspection/ Testing and Inspection