Checking components and wiring
- Ignition on.
Check that the dashboard lighting button is not at its lowest setting.
Check that the dashboard lighting button functions. The light intensity must changed on the dashboard as the control is turned up and down.
The fault is in the carphone module if the light intensity for the other instruments change except for the carphone.
Remedy as necessary.
Other information:
- To access or replace the carphone module, see Telephone module/-control module (PHM), changing .