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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connectors X3 and X4 from the BCM.
  2. Test for less than 1.0 ohm between the ground circuits X3 terminal 1, X3 terminal 5, and X4 terminal 9 and the negative terminal of the battery.
    • If greater than the specified value, repair the ground circuit.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuits X3 terminal 3 and X4 terminal 10 of the BCM and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the BCM.
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