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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the telltale assembly information center.
  2. Ignition ON, place the transmission in reverse. Verify a test lamp illuminates when connected between the supply voltage circuit terminal A and ground.
    • If the test lamp does not illuminate, test the supply voltage circuit for a short to ground or an open/high resistance.
  3. Ignition ON, scan tool installed, place the transmission in reverse. Verify that a test lamp illuminates when connected between the supply voltage circuit terminal A and each indicator control circuit terminals B, C, and D while performing the scan tool special functions LED test.
    • If the test lamp does not illuminate for one or more indicator control circuits, test the suspect indicator control circuit for a short to ground or an open/high resistance. If all the circuit(s) test normal, replace the telltale assembly information center.
  4. If all circuits test normal, test or replace the object alarm module.
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