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Circuit / System Testing

Test 1

  1. Vehicle Power Mode - Off.
  2. Disconnect the electrical connector: X1 @ S79D Front Side Door Window Control Switch-Driver
  3. Verify a test lamp illuminates between ground circuit terminal 1 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open / high resistance on circuit 3850 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  4. Vehicle Power Mode - Run / Service Mode.
  5. Verify a test lamp Illuminates between B+ circuit terminal 8 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Test the B+ circuit 2440 for an open / high resistance.
      • if an open / high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open or high resistance is not found
    2. Verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Test the B+ circuit 2440 for a short to ground
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found
    2. Replace the S79D Front Side Door Window Control Switch-Driver
    • Go to next step: If the test lamp illuminates 
  6. Vehicle Power Mode - Off.
  7. Connect the electrical connector. S79D Front Side Door Window Control Switch-Driver
  8. Disconnect the electrical connector: M74D Front Side Door Window Regulator Motor-Driver
  9. Vehicle Power Mode - Run / Service Mode.
  10. Verify a test lamp Illuminates between B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Test the B+ circuit 540 for an open / high resistance.
      • if an open / high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open or high resistance is not found
    2. Verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Test the B+ circuit 540 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
    2. Replace the M74D Front Side Door Window Regulator Motor-Driver.
    • Go to next step: If the test lamp illuminates 
  11. Vehicle Power Mode - Off.
  12. Connect a test lamp between the test points: Signal circuit terminal 3 & B+.
  13. Vehicle Power Mode - Run / Service Mode.
  14. Operate the component: Driver Left Front Window Switch @ S79D Front Side Door Window Control Switch-Driver - Pulled

    Verify the test lamp state:

    Driver Left Front Window Switch - Not Used = Test lamp Off

    Driver Left Front Window Switch - Pulled = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79D Front Side Door Window Control Switch-Driver.
    3. Test for less than 2 Ω in the circuit 2763 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • Go to next step: If less than 2 Ω.
    4. Vehicle Power Mode - Run / Service Mode.
    5. Test for less than 1 V between the circuit 2763 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79D Front Side Door Window Control Switch-Driver.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79D Front Side Door Window Control Switch-Driver.
    3. Test for infinite resistance between the circuit 2763 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the S79D Front Side Door Window Control Switch-Driver
    • Go to next step: If the test lamp turns ON and OFF 
  15. Connect a test lamp between the test points: Signal circuit terminal 7 & B+.
  16. Vehicle Power Mode - Run / Service Mode.
  17. Operate the component: Driver Left Front Window Switch @ S79D Front Side Door Window Control Switch-Driver - Pressed

    Verify the test lamp state:

    Driver Left Front Window Switch - Not Used = Test lamp Off

    Driver Left Front Window Switch - Pressed = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79D Front Side Door Window Control Switch-Driver.
    3. Test for less than 2 Ω in the circuit 2764 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • Go to next step: If less than 2 Ω.
    4. Vehicle Power Mode - Run / Service Mode.
    5. Test for less than 1 V between the circuit 2764 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79D Front Side Door Window Control Switch-Driver.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79D Front Side Door Window Control Switch-Driver.
    3. Test for infinite resistance between the circuit 2764 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the S79D Front Side Door Window Control Switch-Driver
    • Go to next step: If the test lamp turns ON and OFF 
  18. Connect a test lamp between the test points: Signal circuit terminal 5 & B+.
  19. Vehicle Power Mode - Run / Service Mode.
  20. Operate the component: Driver Left Front Window Switch @ S79D Front Side Door Window Control Switch-Driver - Pressed & Pulled

    Verify the test lamp state:

    Driver Left Front Window Switch - Not Used = Test lamp Off

    Driver Left Front Window Switch - Pressed = Test lamp On

    Driver Left Front Window Switch - Pulled = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X2 harness connector at the S79D Front Side Door Window Control Switch-Driver.
    3. Test for less than 2 Ω in the circuit 2766 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • Go to next step: If less than 2 Ω.
    4. Vehicle Power Mode - Run / Service Mode.
    5. Test for less than 1 V between the circuit 2766 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79D Front Side Door Window Control Switch-Driver.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X2 harness connector at the S79D Front Side Door Window Control Switch-Driver.
    3. Test for infinite resistance between the circuit 2766 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the S79D Front Side Door Window Control Switch-Driver
    • Go to next step: If the test lamp turns ON and OFF 
  21. Test or replace the component: M74D Front Side Door Window Regulator Motor-Driver.

Test 2

  1. Vehicle Power Mode - Off.
  2. Disconnect the electrical connector: X1 @ S79P Front Side Door Window Switch-Passenger.
  3. Verify a test lamp illuminates between ground circuit terminal 1 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open / high resistance on circuit 2150 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  4. Vehicle Power Mode - Run / Service Mode.
  5. Verify a test lamp Illuminates between B+ circuit terminal 8 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Test the B+ circuit 240 for an open / high resistance.
      • if an open / high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open or high resistance is not found.
    2. Verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Test the B+ circuit 240 for a short to ground
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
    2. Replace the S79P Front Side Door Window Switch-Passenger.
    • Go to next step: If the test lamp illuminates 
  6. Vehicle Power Mode - Off.
  7. Connect the electrical connector.X1 @ S79P Front Side Door Window Switch-Passenger.
  8. Disconnect the electrical connector: M74P Front Side Door Window Regulator Motor-Passenger
  9. Connect a test lamp between the test points: Control circuit terminal 1 & Ground
  10. Vehicle Power Mode - Run / Service Mode.
  11. Operate the component: S79P Front Side Door Window Switch-Passenger - Pulled

    Verify the test lamp state:

    S79P Front Side Door Window Switch-Passenger - Not Used = Test lamp Off

    S79P Front Side Door Window Switch-Passenger - Pulled = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79P Front Side Door Window Switch-Passenger.
    3. Test for infinite resistance between the circuit 666 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance.
    4. Test for less than 2 Ω in the circuit 666 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • If less than 2 Ω, replace the S79P Front Side Door Window Switch-Passenger.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79P Front Side Door Window Switch-Passenger.
    3. Vehicle Power Mode - Run / Service Mode.
    4. Test for less than 1 V between the circuit 666 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79P Front Side Door Window Switch-Passenger.
    • Go to next step: If the test lamp turns ON and OFF 
  12. Connect a test lamp between the test points: Control circuit terminal 2 & Ground
  13. Vehicle Power Mode - Run / Service Mode.
  14. Operate the component: S79P Front Side Door Window Switch-Passenger - Pressed

    Verify the test lamp state:

    S79P Front Side Door Window Switch-Passenger - Not Used = Test lamp Off

    S79P Front Side Door Window Switch-Passenger - Pressed = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79P Front Side Door Window Switch-Passenger.
    3. Test for infinite resistance between the circuit 667 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 Ω in the circuit 667 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • If less than 2 Ω, replace the S79P Front Side Door Window Switch-Passenger.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the X1 harness connector at the S79P Front Side Door Window Switch-Passenger.
    3. Vehicle Power Mode - Run / Service Mode.
    4. Test for less than 1 V between the circuit 667 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79P Front Side Door Window Switch-Passenger.
    • Go to next step: If the test lamp turns ON and OFF 
  15. Test or replace the component: M74P Front Side Door Window Regulator Motor-Passenger

Test 3

  1. Vehicle Power Mode - Off.
  2. Disconnect the electrical connector: S79LR Rear Side Door Window Switch - Left
  3. Verify a test lamp illuminates between ground circuit terminal 7 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open / high resistance on circuit 3850 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  4. Verify a test lamp illuminates between ground circuit terminal 3 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open / high resistance on circuit 3151 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  5. Vehicle Power Mode - Run / Service Mode.
  6. Verify a test lamp Illuminates between B+ circuit terminal 8 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Test the B+ circuit 540 for an open / high resistance.
      • if an open / high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open or high resistance is not found
    2. Verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Test the B+ circuit 540 for a short to ground
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found
    2. Replace the S79LR Rear Side Door Window Switch - Left
    • Go to next step: If the test lamp illuminates 
  7. Vehicle Power Mode - Off.
  8. Connect the electrical connector. S79LR Rear Side Door Window Switch - Left
  9. Disconnect the electrical connector: M74LR Rear Side Door Window Regulator Motor - Left
  10. Connect a test lamp between the test points: Control circuit terminal 1 & Ground
  11. Vehicle Power Mode - Run / Service Mode.
  12. Operate the component: S79LR Rear Side Door Window Switch - Left - Pulled

    Verify the test lamp state:

    S79LR Rear Side Door Window Switch - Left - Not Used = Test lamp Off

    S79LR Rear Side Door Window Switch - Left - Pulled = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79LR Rear Side Door Window Switch - Left.
    3. Test for infinite resistance between the circuit 668 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance.
    4. Test for less than 2 Ω in the circuit 668 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • If less than 2 Ω, replace the S79LR Rear Side Door Window Switch - Left
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79LR Rear Side Door Window Switch - Left.
    3. Vehicle Power Mode - Run / Service Mode.
    4. Test for less than 1 V between the circuit 668 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79LR Rear Side Door Window Switch - Left.
    • Go to next step: If the test lamp turns ON and OFF 
  13. Connect a test lamp between the test points: Control circuit terminal 2 & Ground
  14. Vehicle Power Mode - Run / Service Mode.
  15. Operate the component: S79LR Rear Side Door Window Switch - Left - Pressed

    Verify the test lamp state:

    S79LR Rear Side Door Window Switch - Left - Not Used = Test lamp Off

    S79LR Rear Side Door Window Switch - Left - Pressed = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79LR Rear Side Door Window Switch - Left.
    3. Test for infinite resistance between the circuit 669 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance.
    4. Test for less than 2 Ω in the circuit 669 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • If less than 2 Ω, replace the S79LR Rear Side Door Window Switch - Left.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79LR Rear Side Door Window Switch - Left.
    3. Vehicle Power Mode - Run / Service Mode.
    4. Test for less than 1 V between the circuit 669 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79LR Rear Side Door Window Switch - Left.
    • Go to next step: If the test lamp turns ON and OFF 
  16. Test or replace the component: M74LR Rear Side Door Window Regulator Motor - Left

Test 4

  1. Vehicle Power Mode - Off.
  2. Disconnect the electrical connector: S79RR Rear Side Door Window Switch - Right
  3. Verify a test lamp illuminates between ground circuit terminal 7 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open / high resistance on circuit 2150 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  4. Vehicle Power Mode - Run / Service Mode.
  5. Verify a test lamp Illuminates between B+ circuit terminal 8 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Test the B+ circuit 240 for an open / high resistance.
      • if an open / high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open or high resistance is not found.
    2. Verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Test the B+ circuit 240 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
    2. Replace the S79RR Rear Side Door Window Switch - Right.
    • Go to next step: If the test lamp illuminates 
  6. Vehicle Power Mode - Off.
  7. Connect the electrical connector. S79RR Rear Side Door Window Switch - Right
  8. Disconnect the electrical connector: M74RR Rear Side Door Window Regulator Motor - Right
  9. Connect a test lamp between the test points: Control circuit terminal 1 & Ground
  10. Vehicle Power Mode - Run / Service Mode.
  11. Operate the component: S79RR Rear Side Door Window Switch - Right - Pulled

    Verify the test lamp state:

    S79RR Rear Side Door Window Switch - Right - Not Used = Test lamp Off

    S79RR Rear Side Door Window Switch - Right - Pulled = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79RR Rear Side Door Window Switch - Right.
    3. Test for infinite resistance between the circuit 670 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance.
    4. Test for less than 2 Ω in the circuit 670 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • If less than 2 Ω, replace the S79RR Rear Side Door Window Switch - Right.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79RR Rear Side Door Window Switch - Right.
    3. Vehicle Power Mode - Run / Service Mode.
    4. Test for less than 1 V between the circuit 670 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79RR Rear Side Door Window Switch - Right.
    • Go to next step: If the test lamp turns ON and OFF 
  12. Connect a test lamp between the test points: Control circuit terminal 2 & Ground
  13. Vehicle Power Mode - Run / Service Mode.
  14. Operate the component: S79RR Rear Side Door Window Switch - Right - Pressed

    Verify the test lamp state:

    S79RR Rear Side Door Window Switch - Right - Not Used = Test lamp Off

    S79RR Rear Side Door Window Switch - Right - Pressed = Test lamp On

    • If the test lamp is always OFF 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79RR Rear Side Door Window Switch - Right.
    3. Test for infinite resistance between the circuit 671 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance.
    4. Test for less than 2 Ω in the circuit 671 end to end.
      • If 2 Ω or greater, repair the open / high resistance in the circuit.
      • If less than 2 Ω, replace the S79RR Rear Side Door Window Switch - Right.
    • If the test lamp is always ON 
    1. Vehicle Power Mode - Off.
    2. Remove the test lamp, disconnect the harness connector at the S79RR Rear Side Door Window Switch - Right.
    3. Vehicle Power Mode - Run / Service Mode.
    4. Test for less than 1 V between the circuit 671 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the S79RR Rear Side Door Window Switch - Right.
    • Go to next step: If the test lamp turns ON and OFF 
  15. Test or replace the component: M74RR Rear Side Door Window Regulator Motor - Right
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