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Circuit/System Testing

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  1. Ignition OFF, park lamps OFF, disconnect all of the lamp components on the I/P lamp dimming control circuit. Verify DTC B2652 00 does not set.
    • If the DTC resets, test for a short to voltage, short to ground, or an open in the I/P lamp dimming control circuit and for an open in the dimmer switch 5-volt reference circuit. If the circuit/connections test normal, replace the BCM.
  2. Reconnect each component one at a time and test for the DTC B2652 00.
    • If the DTC resets, replace that particular component.
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