Power Windows Malfunction (Except Crew Cab)
Power Windows Malfunction (Except Crew Cab)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The driver window switch is supplied battery voltage through 30A fuse in the underhood fuse block. The driver window switch controls power and ground to the window motor through the motor control circuits. The driver window switch can be energized by the integrated rocker switch. While the driver window switch is in an inactive state, both of the window motor control circuits are grounded. When the switch is energized the battery supply circuit is closed to the corresponding motor control circuit while the other control circuit remains grounded. The supply side of the switch receives voltage through the pwr/wndw fuse.
The passenger power windows can also be operated from the driver window switch master control which provides a low reference. The passenger window switches on the driver master control have 2 positions; UP and DOWN, their position is a direct input into the driver window switch.
Reference Information
Schematic Reference
Moveable Window Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Power Windows Description and Operation (Power Windows Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Circuit/System Verification
1. Ignition ON, command the driver and passenger windows UP and DOWN using the window switches on the driver master control and the passenger door window switch. 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 passenger door window is inoperative, refer to Passenger Power Window Malfunction.
2. Command the express down function by pressing the driver window switch past the first detent and releasing. The driver window should roll completely down.
• If the function does not perform as specified, replace the driver window switch.
Circuit/System Testing
Driver Power Window Malfunction
1. Ignition OFF, disconnect the X1 harness connector at the driver 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 B+ circuit terminal 6 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
5. Ignition OFF, connect the X1 harness connector at the driver window switch and disconnect the harness connector at the driver window motor.
6. Test for less than 5 ohms 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 window switch.
7. Test for less than 5 ohms 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 window switch.
8. Connect a test lamp between 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 remains OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the driver 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 front passenger 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 B+ circuit terminal 11 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Test for greater than 10 volts 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 at test lamp between the B+ circuit terminal 11 and the signal circuit terminal 8.
6. Command the passenger window DOWN using the RF window switch on the driver master control, the test lamp should illuminate during the DOWN command.
• If the test lamp is always OFF, test the signal circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the driver window switch.
7. Connect at test lamp between the B+ circuit terminal 11 and the signal circuit terminal 9.
8. Command the passenger window UP using the RF window switch on the driver master control, the test lamp should illuminate during the UP command.
• If the test lamp is always OFF, 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 the front passenger 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 front passenger 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 front passenger window switch.
12. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2.
13. Ignition ON, command the rear window UP and DOWN by using the front passenger window switch. The test lamp should illuminate when commanding the UP and DOWN states.
• If the test lamp remains OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the front passenger window switch.
14. If all circuits test normal, test or replace the window motor.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate window motor.
2. Install a 30 amp fused jumper wire between the control terminal 1 and 12 volts. Momentarily install a jumper wire between the control terminal 2 and ground. The window motor should perform the UP or DOWN function.
• If the function does not perform as specified, replace the window motor.
3. Reverse the jumper wires; the driver window motor should perform the DOWN or UP function.
• If the function 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)
* 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)