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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 359 (WIPER SYSTEM & WASHER SYSTEM)DIAGNOSTIC INFORMATION & PROCEDURESWINDSHIELD WIPER SYSTEM MALFUNCTIONCIRCUIT/SYSTEM TESTING
2006 Isuzu Ascender S, 5.3 M, 4WD

Circuit/System Testing

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Wiper Motor Switch Circuit Test

  1. Disconnect the X2, X3 harness connectors at the turn signal/multifunction switch.
  2. Test for less than 1.0 ohm of between the ground circuit terminal A X2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, test for 11.0-13.0 volts between the 12-volt reference circuit terminal J X3 and ground.
    • If less than the specified range, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the wiper motor cover.
  4. Install a 3A fused jumper wire between the signal circuit terminal K X3 and the 12-volt reference circuit terminal J X3. Ignition ON, verify the wiper motor operates in the wash mode.
    • If the wiper motor does not operate, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, refer to Wiper Motor/Module Circuit Test .
  5. Install a 3A fused jumper wire between the signal circuit terminal H X3 and ground. Ignition ON, verify the wiper motor operates in the high speed mode.
    • If the wiper motor does not operate, test the signal circuit for an open/high resistance. If the circuit tests normal, refer to Wiper Motor/Module Circuit Test .
  6. If all circuits test normal, test or replace the turn signal/multifunction switch.

Wiper Motor/Module Circuit Test

  1. Ignition OFF, disconnect the harness connector at the windshield wiper motor cover.
  2. Test for less than 1.0 ohm between the ground circuit terminal M and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminal F and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Remove the wiper motor cover.
  5. Connect the harness connector at the windshield wiper motor cover.
  6. Connect a test lamp between the circuit board terminals T1 and T3.
  7. Ignition ON, wiper switch in low, verify the test lamp turns on for 15 seconds.
    • If the test lamp does not turn on, replace the wiper motor cover.
  8. If all circuits test normal, test or replace the windshield wiper motor.
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