Circuit/System Verification

Ignition ON.
Verify the driver window performs the UP and DOWN functions.
- If the driver window does not perform the UP or DOWN functions
  Refer to Circuit/System Testing - Driver Window Inoperative .
- If the driver window performs the UP and DOWN functions
Verify the passenger window performs the UP and DOWN functions at both the driver and passenger door switches.
- If the M74P Window Motor-Passenger is inoperative from both the S79D Window Switch-Driver and S79P Window Switch-Passenger
  Refer to Circuit/System Testing - Passenger Window Inoperative From Both Switches .
- If the M74P Window Motor-Passenger is inoperative from the S79P Window Switch-Passenger only
  Refer to Circuit/System Testing Circuit/System Testing - Passenger Window Switch Inoperative .
- If the M74P Window Motor-Passenger is inoperative from the S79D Window Switch-Driver only
  Test or replace the S79D Window Switch - Driver.
- If the M74P Window Motor-Passenger performs the UP and DOWN functions at both S79D Window Switch-Driver and S79P Window Switch-Passenger
Verify the M74LR Window Motor-Left Rear and M74RR Window Motor-Right Rear performs the UP and DOWN functions at both the S79D Window Switch-Driver and each of the S79 Window Switch-Rear.
- If a M74 Window Motor-Rear is inoperative from both the S79D Window Switch-Driver and S79 Window Switch-Rear
  Refer to Circuit/System Testing - Rear Window Inoperative From Both Switches
- If a M74 Window Motor-Rear is inoperative from the S79 Window Switch-Rear only
  Refer to Circuit/System Testing - Rear Window Switch Inoperative .
- If a M74 Window Motor-Rear is inoperative from the S79D Window Switch-Driver only
  Test or replace the S79D Window Switch-Driver.
- If the M74 Window Motor-Rear performs the UP and DOWN functions at both the S79D Window Switch-Driver and the S79 Window Switch-Rear
Lock out the rear window switches by pressing the lockout switch on the S79D Window Switch-Driver.
Verify the M74LR Window Motor-Left Rear and M74RR Window Motor-Right Rear is inoperative at both of the S79 Window Switch-Rear.
- If both M74 Window Motor-Rear continue to function from the S79 Window Switch-Rear
  Refer to Circuit/System Testing - Rear Window Lockout Inoperative
- If both M74 Window Motor-Rear is inoperative from the S79 Window Switch-Rear
All OK.