Power Window Relay: Testing and Inspection

Window Drop Relay Assembly Conditions Test

Window Drop Relay Assembly:

When testing for a voltage signal, use a digital voltmeter, because the signal will last only 280 to 380 milliseconds. Place the ignition switch in the run position with out engine running.

When Pressing The Top Switch, All Windows Do Not Lower
1. Check for battery voltage at Pin 1 and 2 of the window timer module wire connector. If OK, go to Step 2. If not OK, check circuit breaker top switch. Repair as necessary.
2. Using a ohmmeter, check Pin 9 of the window timer module wire connector for ground. If OK, go to Step 3. If not OK, repair as necessary.
3. Using a digital voltmeter, check Pin 7 of the window timer module wire connector for voltage signal for 280 to 380 milliseconds while pressing the top switch. If not OK, replace the window timer module. If OK, check power window circuit connections.

When Pressing The Top Switch, The Front Window(s) Do Not Lower
1. Using a digital voltmeter, check Pin 4 of both window motor relay wire connectors for voltage signal while pressing the top switch. If there is a momentary voltage, go to Step 2. If not OK, window timer relay.
2. Using a ohmmeter, check Pin 6 of the both window motor relays wire connector for ground. If OK, go to Step 3. If not OK, repair ground as necessary.
3. Using a ohmmeter, check Pin 85 to Pin 86 of window motor relay with connector disconnected for open circuit. If OK, check power window circuit connections. If open circuit replace window motor relay.

When Pressing The Top Switch, The Rear Window(s) Do Not Lower
1. Using a digital voltmeter, check Pin 4 and Pin 6 of the window timer module wire connector for battery voltage while pressing the top switch. If no voltage replace the window timer module. If voltage, check power window circuit connections.