LM - New Range Rover
LS - Range Rover Sport
LA - Discovery 4
Title 10my instrument dimmer switch operation
Last Modified 27-AUG-2009 11:23
Symptom 204000 Instrumentation
Customers may comment that the instrument lighting dimmer switch does not appear to operate correctly.
The dimmer switch will only affect the switch background illumination under all master light switch conditions i.e. side, low beam and auto. The dimming of the instrument pack, HLDF gear selector etc will only function in "night mode"
There is a light sensor built into the instrument pack. When the ambient light drops below a pre-determined level, "night mode" is activated, the dimmer switch will then operate all features. In auto headlamp mode the instrument pack still needs to have entered "night mode" for the dimmer switch to function.
If there is a requirement to test the dimmer switch in normal light:
To fool the system to enter "night mode" select side lights on the master light switch, completely cover the area around the instrument pack to block out light ingress and wait for a few minutes. You should then see the instrument pack illumination change when operating the dimmer switch.