Dim Sw Short To Ground

When Monitored: Ignition in RUN and IOD fuse/connector installed.

Set Condition: The voltage of the Panel Lamps Dimmer Signal circuit has gone less than 0.3 volts for 5 seconds.

Possible Causes are:

• LEFT MULTI-FUNCTION SWITCH SHORTED
• PANEL LAMPS DIMMER SIGNAL CIRCUIT SHORT TO GROUND
• HEADLAMP SWITCH RETURN CIRCUIT SHORT TO GROUND
• BCM

1. Disconnect the left multi-function switch connector. Turn ignition on. Using the DRBIII(R) in Sensors, read the Panel Lamp voltage. Is the voltage less than 4 volts? If yes, go to next step. If no, replace the left multi-function switch. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
2. Turn ignition off. Disconnect the left multi-function switch connector. Disconnect the Body Control Module C1 connector. Measure the resistance of the Panel Lamps Dimmer Signal circuit to a known-good ground. Is the resistance less than 1000 ohms? If yes, repair the Panel Lamps Dimmer Signal circuit for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
3. Turn ignition off. Disconnect the Left Multi-function switch connector. Disconnect the Body Control Module C1 connector. Measure the resistance of the Headlamp Switch Return circuit to a known-good ground. Is the resistance less than 1000 ohms? If yes, repair the Headlamp Switch Return circuit for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
4. If there are no possible causes remaining, replace the Body Control Module. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.