22 · Diagnostics

Instrument lights dimmer not working

Make: Fiat
Model: Bravo Factory Service Manual
Year: 2007–2014
Section: Instrument panel › Instrument lights dimmer not working

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Fault diagnosisInstrument lights dimmer not working

INSTRUMENT LIGHTS DIMMER NOT WORKING

With the ignition ON and the side lights on, the instrument panel lights up, but when the lighting controls are operated it remains on constantly

The side lights work properly

1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
		Test results
	Using the Examiner in the Instrument Panel Node mode, check that there are no errors and that the parameters are present	Move on to Step 5	1. Impossible to connect with the Instrument Panel control unit 2. Presence of errors	1. Move on to Step 2 2. Continue following the instructions on the diagnostic instrument
2	ELECTRICAL POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the electricity supply to the Instrument Panel Node is correct.	Move on to Step 3	Fault in positive electrical supply and/or earth	Replace defective component (in the case of a fuse, find out what caused it to blow)
3	ELECTRICAL CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Check the wiring between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected see Wiring Diagram See E4010 INSTRUMENT PANEL	Move on to Step 4	Electrical connections not operational	Renew the damaged electrical connections
4	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Use an Examiner to check the possibility of connection to the Instrument Panel Node	Move on to Step 6	Impossible to connect with the Instrument Panel control unit	Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R
5	ACTIVE DIAGNOSIS CHECK	All OK	Problems encountered	Operation
	With the Examiner in Instrument Panel Node mode, check that the instrument panel light is correctly activated in Active Diagnosis	Move on to Step 6	The panel lighting does not activate	Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R
6	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Using the Examiner check, in the Body Computer ambient, that there are no errors and that the lighting parameter varies	End of diagnosis	1. Impossible to connect to the Body Computer control unit 2. Presence of errors 3. The parameters do not change	1. Move on to Step 7 2. Continue following the instructions on the diagnostic instrument 3. Move on to Step 10
7	ELECTRICAL POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the electricity supply to the Body Computer Node is correct	Move on to Step 8	Fault in positive electrical supply and/or earth	Replace defective component (in the case of a fuse, find out what caused it to blow)
8	CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Check the continuity of the wiring between the control panel and the Body Computer Node See E4010 INSTRUMENT PANEL Also check that the Menu +/- buttons are working properly	Move on to Step 9	1. Electrical connections not operational 2. Buttons faulty	1. Renew the damaged electrical connections 2. Replace the control panel Op. 7040A56 SWITCH UNIT IN DASHBOARD - R.R.
9	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Use an Examiner to check the possibility of connection to the Body Computer Node	Move on to Step 10	Impossible to connect to the Body Computer control unit	Replace the Body Computer Node Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.
10	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Contact technical service for further information on the problem

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Parts & tools for this job For 2007 Fiat Bravo

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