Test G: The Instrument Panel Illumination Does Not Dim

PINPOINT TEST G: THE INSTRUMENT PANEL ILLUMINATION DOES NOT DIM

G1-G3:

G3-G4:

G5-G7:

Normal Operation
The lighting control module (LCM) supplies a variable pulse width modulated (PWM) voltage to the instrument panel switches through circuit 484 (OG/BK). The LCM uses the instrument panel dimmer switch to determine the intensity of switch illumination.

Possible Causes
- Circuit 484 (OG/BK) short to voltage
- Circuit 1036 (BN/WH) open, short to ground or voltage
- Instrument panel dimmer switch
- LCM