Instrument Lighting

Instrument Lighting:

Fault symptoms
Instrument lighting inoperative.

Diagnostic help
Information on the rheostat setting, cabin brightness and display lighting intensity comes from the SID.

The MIU uses the information to control the brightness of the instrument lighting, warning and indicator lamps, and the display lighting.

Check the wiring harness
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic tool during the test.