B2558

Diagnostic Chart 4:

Schematic:

The BCM directly controls the dome lamp when the dome lamp switch is set in the "DOOR" position. On the wagon the BCM also controls the rear hatch courtesy lamp.

When any door (or wagon hatch) is open the BCM will ground circuit 156, providing a ground path for the dome lamp (and cargo lamp on wagons).

The dome lamp is also commanded On when the key is removed from the ignition or an RKE request to turn On the dome lamp occurs.

DTC Parameters
- Dome lamp does not come On when requested by the BCM
- Circuit 156 shorted to battery

Diagnostic AIDS
- Check for poor connection at the BCM. Inspect harness connectors for backed out terminals, improper terminal mating, broken connector locks, improperly formed or damaged terminals and poor terminal to wire connection (terminal crimped over wire insulation and not conductors). Inspect wiring harness for damage.
- If fault is suspected to be intermittent, wiggling harness wiring may help in locating fault.