Instrument lights dimmer not working
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- Instrument panel › Instrument lights dimmer not working
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 | ACTION |
|---|---|---|---|---|
| Using the Examiner check, in the Instrument Panel Node ambient, 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 | 1. Move on to Step 2 | |
| 2. Presence of errors | 2. Continue following the instructions on the diagnostic instrument | |||
| 2 | ELECTRICAL POWER SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| 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 | CHECK ELECTRICAL CONNECTIONS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
Check the wiring between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected | Move on to Step 4 | Electrical connections not operational | Renew the damaged electrical connections | |
| 4 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Use an Examiner to check the possibility of connection to the Instrument Panel Node | Move on to Step 5 | Impossible to connect with the Instrument Panel control unit | Replace the Instrument Panel | |
| 5 | ACTIVE DIAGNOSIS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| 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 is not activated | Replace the Instrument Panel | |
| 6 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Using the Examiner check, in the Body Computer ambient, that there are no errors and that the lighting parameter varies | Move on to Step 7 | 1. Impossible to connect to the Body Computer control unit. | 1. Move on to Step 7 | |
| 2. Presence of errors | 2. Continue following the instructions on the diagnostic instrument | |||
| 3. The parameters do not change | 3. Move on to Step 9 | |||
| 7 | ELECTRICAL POWER SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| 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 | ACTION |
Check the continuity of the wiring between the control panel and the Body Computer Node | Move on to Step 9 | Electrical connections not operational | Renew the damaged electrical connections | |
| 9 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| 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 Body Computer | |
| 10 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check that the fault is no longer present | End of diagnosis |
Parts & tools for this job For 2005 Alfa Romeo 159
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Alfa Romeo 159
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