BCM - Dimming Level Switch Failure

Test 1:

Test 2 - 6:

Test 7 - 10:

Test 11:

SYMPTOM
BCM - DIMMING LEVEL SWITCH FAILURE

WHEN MONITORED
Continuously.

SET CONDITION
The BCM detects an open or short circuit condition for 10 seconds on the Panel Lamps Dimmer Signal circuit.

POSSIBLE CAUSES
- Checking dimming switch positions
- Headlamp switch - open
- Headlamp switch - shorted
- Open headlamp switch return circuit
- Panel lamp dimmer signal circuit shorted to ground
- BCM - headlamp return circuit open
- Measure the voltage of the panel lamp dimmer signal circuit
- Measure the voltage of the panel lamp dimmer signal circuit
- Open panel lamp dimmer signal circuit
- Panel lamp dimmer signal circuit shorted to the headlamp switch return circuit
- Panel lamp dimmer signal circuit shorted to voltage