Power Windows Malfunction (Crew Cab)
Power Windows Malfunction (Crew Cab)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
Each power window contains a reversible power window motor. The direction the window travels is dependent upon the polarity of the supply voltage. By reversing polarity of the supply voltage the window motor will move up or down. Each power window motor is internally circuit breaker protected.
Battery voltage is supplied to each power window switch through the accessory voltage supply circuit. The power window switch also receives a constant ground source. The power window motor control circuits are connected to ground through the normally closed up and down contacts of the power window switch. When the power switch is placed in the down position, the power window motor down control circuit is switched to 12 volts and is applied to the down side of the power window motor. Since the other side of the power motor is connected to ground through the normally closed contacts of the up switch, the window travels down. By placing the power window switch in the up position, the polarity of the power window motor is reversed and the window travels up.
Diagnostic Aids
The power window fuse may open when all windows are simultaneously commanded UP and DOWN repeatedly by using all four switches. This will cause the windows to become inoperative with no trouble found.
Inform the owner that this is a design characteristic. No repairs should be attempted. To reduce the likelihood of this situation from occurring, do not continue to operate all the windows completely open/closed at the same time and running the motor against the stops. This situation will produce the maximum current draw and can increase the chances for the fuse to open.
Reference Information
Schematic Reference
Moveable Window Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
Power Windows Description and Operation Power Windows
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Circuit/System Verification
1. Ignition ON, command each window UP and DOWN using the window switches on the driver door lock/window switch and the respective local door window switches. Each window should perform the UP and DOWN functions from each switch.
• If the driver door window is inoperative, refer to Driver Power Window Malfunction.
• If the front passenger door window is inoperative, refer to Passenger Power Window Malfunction.
• If the left rear or right rear door window is inoperative, refer to Rear Power Window Malfunction.
2. Disable and enable the rear window switches by pressing and depressing the lockout switch on the driver door lock/window switch. The window switch-left rear and window switch-right rear should be enabled and disabled when changing between the commanded states.
• If a rear window switch continues to function while disabled, refer to Lockout Switch Malfunction.
3. Command the express down function of the driver door window by pressing down on the driver's window switch past the first detent and releasing. The drivers window should roll completely down.
• If the function does not perform as specified, replace the driver door lock/window switch.
Circuit/System Testing
Driver Power Window Malfunction
1. Ignition OFF, disconnect the X1 harness connector at the driver door lock/window switch.
2. Test for less than 1 ohm between the ground circuit terminal 3 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Verify that a test lamp illuminates between the RAP circuit terminal 6 and ground.
• If the test lamp does not illuminate, test the RAP circuit for a short to ground or an open/high resistance
5. Ignition OFF, connect the X1 harness connector at the driver door lock/window switch and disconnect the harness connector at the driver window motor.
6. Test for less than 5 ohm between the control circuit terminal 1 and ground.
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the driver door lock/window switch.
7. Test for less than 5 ohm between the control circuit terminal 2 and ground.
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the driver door lock/window switch.
8. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
9. Command the driver window UP and DOWN by using the driver window switch. The test lamp should illuminate when commanding the UP and DOWN states.
• If the test lamp does not illuminate during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the driver door lock/window switch.
10. If all circuits test normal, test or replace the driver window motor.
Passenger Power Window Malfunction
1. Ignition OFF, disconnect the harness connector at the passenger door lock/window switch.
2. Test for less than 1 ohm between the ground circuit terminal 5 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the RAP circuit terminal 11 and ground.
• If the test lamp does not illuminate, test the RAP circuit for a short to ground or an open/high resistance.
Note: Verify the passenger window switch is enabled by checking the lockout switch on the driver door lock/window switch.
4. Test for greater than 10 V between the control circuit terminal 7 and ground.
• If less than the specified range, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the driver window switch.
5. Connect a test lamp between the RAP circuit terminal 11 and the signal circuit terminal 8.
6. Command the front passenger window DOWN using the RF window switch on the river door lock/window switch, the test lamp should illuminate during the DOWN command.
• If the test lamp does not illuminate, test the signal circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the river door lock/window switch.
7. Connect a test lamp between the RAP circuit terminal 11 and the signal circuit terminal 9.
8. Command the front passenger window UP using the RF window switch on the river door lock/window switch, the test lamp should illuminate during the UP command.
• If the test lamp does not illuminate, test the signal circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the river door lock/window switch.
9. Ignition OFF, connect the harness connector at the passenger door lock/window switch and disconnect the harness connector at the window motor.
10. Test for less than 1 ohm between the control circuit terminal 1 and ground.
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door lock/window switch.
11. Test for less than 1 ohm between the control circuit terminal 2 and ground.
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door lock/window switch
12. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
13. Ignition ON, command the rear window UP and DOWN by using the passenger door lock/window switch. The test lamp should illuminate when commanding the UP and DOWN states.
• If the test lamp does not illuminate during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the passenger door lock/window switch.
14. If all circuits test normal, test or replace the window motor.
Rear Power Window Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
2. Test for less than 1 ohm between the ground circuit terminal 3 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the RAP circuit terminal 6 and ground.
• If the test lamp does not illuminate, test the RAP circuit for a short to ground or an open/high resistance.
Note: Verify the rear window switches are enabled by checking the lockout switch on the driver door lock/window switch.
4. Test for greater than 10 V between the control circuit terminal 5 and ground.
• If less than the specified range, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the driver door lock/window switch.
5. Connect at test lamp between the RAP circuit terminal 6 and the signal circuit terminal 4.
6. Command the rear window DOWN using the window switch on the driver door lock/window switch, the test lamp should illuminate during the DOWN command.
• If the test lamp does not illuminate, test the signal circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the driver door lock/window switch.
7. Connect at test lamp between the RAP circuit terminal 6 and the signal circuit terminal 1.
8. Command the rear window UP using the window switch on the driver door lock/window switch, the test lamp should illuminate during the UP command.
• If the test lamp does not illuminate, test the signal circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the driver window switch.
9. Ignition OFF, connect the harness connector at rear window switch and disconnect the harness connector at the rear window motor.
10. Test for less than 1 ohm between the control circuit terminal 1 and ground.
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the rear window switch.
11. Test for less than 1 ohm between the control circuit terminal 2 and ground.
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the rear window switch
12. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
13. Ignition ON, command the rear window UP and DOWN by using the rear window switch. The test lamp should illuminate when commanding the UP and DOWN states.
• If the test lamp does not illuminate during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the rear window switch.
14. If all circuits test normal, test or replace the rear window motor.
Lockout Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
2. Connect a test lamp between the control circuit terminal 5 and ground.
3. Ignition ON, command the window lockout ON and OFF by pressing and depressing the lockout switch on the driver door lock/window switch. The test lamp should turn ON and OFF when changing between the commanded states.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the driver door lock/window switch.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the driver door lock/window switch.
4. If all circuits test normal, test or replace the rear window switch.
Component Testing
Window Motor
1. Ignition OFF, disconnect the harness connector at the appropriate 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 window motor should perform the UP and DOWN functions.
• If it does not perform as specified, replace the window motor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Front Side Door Window Regulator Motor Replacement Service and Repair
* Rear Side Door Window Regulator Motor Replacement Service and Repair
* Front Side Door Window Switch Replacement - Right Side Front Side Door Window Switch Replacement - Right Side
* Front Side Door Window Switch Replacement - Left Side Front Side Door Window Switch Replacement - Left Side
* Rear Side Door Window Switch Replacement Rear Side Door Window Switch Replacement