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Power Windows Inoperative - All (Panel Van)



POWER WINDOWS INOPERATIVE - ALL (PANEL VAN)

DIAGNOSTIC FAULT INFORMATION
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

CIRCUIT/SYSTEM DESCRIPTION
The power window system will operate any time the ignition is the ACC or RUN position. The power window system will also operate whenever the body control module (BCM) is in RAP mode. The master power window switch contains individual window switches for each power window. Both windows are controlled up and down from the master power window switch. 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.

CIRCUIT/SYSTEM VERIFICATION
1. Ignition ON, command the appropriate door window UP and DOWN by pressing the appropriate Window switch. Observe the operation of the appropriate door windows.
2. Ignition ON, command the express down function door window by pressing Auto on the Master Window Switch past the first detent and releasing. The drivers window should roll completely down.
- If the driver's window fails to roll completely down, replace the Master Window Switch.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect the B+ harness connector at the Master Window Switch.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 8 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 an open/high resistance. If the PWR WINDW fuse is open, check the B+ circuit for a short to ground. If the circuit tests normal, replace the BCM.
4. If all circuits test normal, test or replace the Master Window Switch.
5. Ignition OFF, reconnect the harness connector at the Master Window Switch.
6. Ignition OFF, disconnect the harness connector at the appropriate Window Motor.
7. Ignition OFF, connect a test lamp between control circuit terminal A and control circuit terminal B.
8. Ignition ON, command the appropriate door window UP and DOWN by pressing the appropriate window control on the Master Window Switch. The test lamp should turn ON when commanding the UP and DOWN states.
- If the test lamp remains OFF during either of the commands, test for a short to ground on either of the control circuits, if the circuit tests normal, test or replace the Master Window switch.
9. If all circuits test normal, test or replace the appropriate Window Motor.

COMPONENT TESTING

Master Window Switch
1. Ignition OFF, disconnect the harness connector at the Master Window switch.
2. Test for infinite resistance between the signal terminals 7 and 6 and the B+ circuit terminal 1 with the Front Passenger Switch in the INACTIVE position.
- If less than infinite resistance, replace the Master Window switch.
3. Test for less than 2 ohms of resistance between the signal terminal 7 and the B+ circuit terminal 1 with the switch in the UP position.
- If greater than 2 ohms, replace the Master Window switch.
4. Test for less than 2 ohms of resistance between the signal terminal 6 and the B+ circuit terminal 1 with the switch in the DOWN position.
5. If greater than 2 ohms, replace the Master Window switch
6. Test for infinite resistance between the signal terminals 12 and 11 and the B+ circuit terminal 1 with the Driver Switch in the INACTIVE position.
- If less than infinite resistance, replace the Master Window switch.
7. Test for less than 2 ohms of resistance between the signal terminal 12 and the B+ circuit terminal 1 with the switch in the UP position.
- If greater than 2 ohms, replace the Master Window switch.
8. Test for less than 2 ohms of resistance between the signal terminal 11 and the B+ circuit terminal 1 with the switch in the DOWN position.
9. If greater than 2 ohms, replace the Master Window switch.

Window Motor
1. Install a 30 amp fused jumper wire between the control terminal A and 12 volts. Momentarily install a jumper wire between the control terminal B and ground. The appropriate Window Motor should perform the UP or DOWN function.
- If the function does not perform as specified, replace the appropriate Window Motor.
2. Reverse the jumper wires; the appropriate Window Motor should perform the DOWN or UP function.
- If the function does not perform as specified, replace the appropriate Window Motor.

REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
- Front Side Door Window Switch Replacement
- Front Side Door Window Regulator Motor Replacement
- Control Module References for BCM replacement, setup, and programming. Programming and Relearning
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