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Home >> Saturn >> 2007 >> Relay 3.9 W >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Wipers System And Washer System) >> Diagnostic Information and Procedures >> Windshield Wiper Washer System Malfunction >> Circuit/System Testing >> Wiper Motor Circuit/System Testing

Wiper Motor Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the underhood fuse block.
    2. IMPORTANT: The underhood fuse block bottom view illustration is an inverted view of the connectors in the bracket assembly.
  2. Test for less that 5 ohms of resistance between the wiper relay ground circuit in connector C2 terminal N5 and ground.
    • If greater than 5 ohms, test the ground circuit for an open/high resistance.
  3. Connect a 60A fused jumper from the battery supply terminal in connector C6 to the LBEC 2 fuse output circuit 42 in connector C5 terminal F2.
  4. Connect a test lamp from the WIPER 1 relay control circuit in connector C5 terminal K3 to ground.
  5. 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.
  6. Connect a test lamp from battery voltage to the WIPER 2 relay control circuit in connector C5 terminal K1.
  7. 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.
  8. Ignition OFF, connect the underhood fuse block.
  9. Disconnect the harness connector at the wiper motor.
  10. Test for less that 1 ohm of resistance between the wiper motor ground circuit terminal 2 and ground.
    • If greater than 1 ohm, test the ground circuit for an open/high resistance.
  11. Connect a test lamp between the low speed motor control circuit terminal 1 and ground.
  12. 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.
  13. Connect a test lamp between the high speed motor control circuit terminal A and ground.
  14. 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.
  15. If all circuits test normal, replace the windshield wiper motor.
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