Instrument lights / lighting dimmer not working

Fault diagnosisInstrument lights / lighting dimmer not working

INSTRUMENT LIGHTS / LIGHTING DIMMER NOT WORKING

With the ignition ON and the side lights on, the instrument lights up, but the brightness remains constant when the controls are adjusted.

the side lights are working properly

1	CONTROLS CHECK	All OK	Problems met	Operation
		Results of the tests
	Check that the + / - Mode buttons on the Computer left controls panel are working properly: See See E2530 INSTRUMENT LIGHTING	Continue to Step 2	Switches faulty	Replace the control panel Op. Op. 5560B56 PANEL WITH MULTIFUNCTION DISPLAY AND HEADLAMP ALIGNMENT SWITCHES BUTTONS R R
2	ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check: Connections between control panel and NQS; Connections between controls panel and junction unit See See E2530 INSTRUMENT LIGHTING	Continue to Step 3	Connections / supplies not correct	Restore correct connections / supplies See See E2530 INSTRUMENT LIGHTING
3	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner Plus or Smart equipment to the diagnostic socket. Check the operation of the panel light through the active diagnosis of the instrument panel.	Continue to Step 4	Light does not change, instrument panel defective	Replace instrument panel Op. Op. 5560B11 ANALOGUE CONTROL PANEL - R+R OR REPLACE
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

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