Component Testing

Driver Window Switch

1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. With the switch in the INACTIVE position, test for infinite resistance between the control terminals listed below and the ignition terminal 12:
   • Control terminal 7
   • Control terminal 9
   • Control terminal 13
   • Control terminal 14
   • If less than the specified value, replace the S79D window switch-driver.
3. With the switches in the UP positions, test for less than 2 Ω between the control terminals listed below and the ignition terminal 12:
   • Control terminal 9
   • Control terminal 14
   • If greater than the specified range, replace the S79D window switch-driver.
4. With the switches in the DOWN position, test for less than 2 Ω between the control terminals listed below and the ignition terminal 12:
   • Control terminal 7
   • Control terminal 13
   • If greater than the specified range, replace the S79D window switch-driver.

Passenger Window Switch

1. Ignition OFF, disconnect the harness connector at the S79P window switch-passenger.
2. Test for infinite resistance between the control terminals 4 and 1 and the ignition terminal 5 with the switch in the INACTIVE position.
   • If less than the specified value, replace the S79P window switch-passenger.
3. Test for less than 2 Ω between the ignition terminal 5 and the control terminal 1 with the switch in the UP position.
   • If greater than the specified range, replace the S79P window switch-passenger.
4. Test for less than 2 Ω between the ignition terminal 5 and the control terminal 4 with the switch in the DOWN position.
   • If greater than the specified range, replace the S79P window switch-passenger.

Rear Window Switch

1. Ignition OFF, disconnect the harness connector at the appropriate rear S79 window switch.
2. Test for infinite resistance between the control terminals 4 and 1 and the control terminal 5 with the switch in the INACTIVE position.
   • If less than the specified value, replace the rear S79 window switch.
3. Test for less than 2 Ω between the control terminal 5 and the control terminal 1 with the switch in the UP position.
   • If greater than the specified range, replace the rear S79 window switch.
4. Test for less than 2 Ω between the control terminal 5 and the control terminal 4 with the switch in the DOWN position.
   • If greater than the specified range, replace the rear S79 window switch.

Passenger/Rear Window Motor

1. Ignition OFF, disconnect the harness connector at the appropriate passenger or rear M74 window motor.
2. Install a 20 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the M74 window motor should perform the UP and DOWN functions.
   • If it does not perform as specified, replace the M74 window motor.