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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 468 (WIPER SYSTEM & WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESWINDSHIELD WIPER SYSTEM MALFUNCTIONCIRCUIT/SYSTEM TESTINGWIPER MOTOR CIRCUIT/SYSTEM TESTING
2006 Isuzu Ascender S, 5.3 M, 4WD

Wiper Motor Circuit/System Testing

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Wiper Motor Circuit/System Testing
WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the I/P fuse block connectors X2 and X3.
  2. Test for less that 5 ohms of resistance between the wiper relay ground circuit in connector X3 terminal 2 and ground.
    • If greater than 5 ohms, test the ground circuit for an open/high resistance.
  3. Connect a test lamp from the WIPER relay control circuit in connector X2 terminal 32 to ground.
  4. Ignition on, command the Wiper Relay ON and OFF with a scan tool. 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, replace the body control module.
    • 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, replace the body control module.
  5. Connect a test lamp from battery voltage to the WIPER HIGH relay control circuit in connector X2 terminal 31.
  6. Command the Wiper High Speed Relay ON and OFF with a scan tool. 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 ground. If the circuit tests normal, replace the body control module.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the body control module.
  7. Ignition OFF, connect the underhood fuse block.
  8. Disconnect the harness connector at the wiper motor.
  9. Test for less that 1 ohm of resistance between the wiper motor ground circuit terminal C and ground.
    • If greater than 1 ohm, test the ground circuit for an open/high resistance.
  10. Connect a test lamp between the low speed motor control circuit terminal E and ground.
  11. Ignition on, command the Wiper Relay ON and OFF with a scan tool. 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, replace the underhood fuse block.
    • 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, replace the underhood fuse block.
  12. Connect a test lamp between the high speed motor control circuit terminal D and ground.
  13. Command the Wiper High Speed Relay ON and OFF with a scan tool. 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, replace the underhood fuse block.
    • 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, replace the underhood fuse block.
  14. If all circuits test normal, replace the windshield wiper motor.
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