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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the EBCM.
  2. Connect a test lamp between the signal circuit terminal 16 and ground.
  3. Ignition ON, apply and release the brake pedal. The test lamp should turn ON and OFF as the brake pedal is applied and released.
    • If the test lamp is always ON, test the signal circuit for a short to voltage.
    • If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the EBCM.
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