Instrument lights dimmer not working
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Instrument panel › Instrument 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
| Results of the tests | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| Using an Examiner check, in Instrument Panel mode, 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 | CHECK ELECTRICAL CONNECTIONS | 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 | 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 | |
| 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 is not activated | Replace the Instrument Panel | |
| 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 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 | |
| 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 | |
| 10 | CHECK ON CORRECT OPERATION | 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 | |
Parts & tools for this job For 2005 Fiat Grande Punto
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