Test F: The Instrument Panel Illumination Does Not Dim

PINPOINT TEST F: THE INSTRUMENT PANEL ILLUMINATION DOES NOT DIM

F1-F3:

F3-F6:

F6-F7:

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