Bidirectional serial line check
- Make
- Fiat
- Model
- Croma Factory Service Manual
- Year
- 2005–2010
- Section
- Exterior lighting › Bidirectional serial line check
BIDIRECTIONAL SERIAL LINE CHECK
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Disconnect the wiring of the master headlamp 14-way connector. Disconnect the wiring of the slave headlamp 14-way connector. Connect the diagnostic tester in ohmmeter mode and check the continuity between Pin 12 of the headlamp vehicle side wiring 14-way connector and Pin 12 of the headlamp vehicle wiring 14-way connector | Restore wiring continuity |
| 2 | With the headlamp 14-way connectors disconnected, check the insulation to earth by connecting across Pin 12 of each of the connectors and Earth | Restore insulation |
| 3 | Check the continuity across Pin 12 of the headlamp 14 way connector and Pin 14 of the 21-way connector for connection to the Ballast control unit | Replace the Master headlamp |
| 4 | Check the continuity across Pin 12 of the headlamp 14 way connector and Pin 14 of the 21-way connector for connection to the Ballast control unit | Replace the slave headlamp |
Parts & tools for this job For 2005 Fiat Croma
- PARTReplacement bulbsSearch: Fiat Croma 2005 bulbs
- TOOLDigital multimeterSearch: automotive digital multimeter
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