B2665

Diagnostic Chart:

CIRCUIT DESCRIPTION
The Headlamp switch provides a direct ground input into the Body Control Module (BCM) for the park lamp switch input when the switch is activated. This input is used by the BCM to control the park lamps.

CONDITIONS FOR RUNNING THE DTC
The headlamp switch must be in the HEAD position.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to battery or open in the park lamp circuit when the headlamp switch is in the HEAD position.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM stores DTC B2665 in memory.
^ The SERVICE VEHICLE SOON telltale will illuminate.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B2665 will clear if the BCM no longer detects a short to battery or open.
^ A history DTC B2665 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ A scan tool may be used to clear the DTC.

DIAGNOSTIC AIDS
^ If the DTC B2665 is a history DTC, the fault may be intermittent.
^ The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to battery or open in the park lamp switch input circuit.
- The headlamp switch is intermittently open internally
- The BCM is intermittently shorted to battery or open internally