Faultfinding table (page 2 of 2)
- Make
- Alfa Romeo
- Model
- 145/146 Electrical System Diagnosis Manual, Volume 3
- Year
- 1994–2001
- Section
- Front and Rear Foglights
146 electrical system diagnosisFaultfinding table · page 2 of 2
| CHECK REAR FOG GUARD DEVICE (N25) | TEST A | ||
|---|---|---|---|
| TEST PROCEDURE | RESULT | CORRECTIVE ACTION | |
| A1 | CHECK VOLTAGE – Disconnect device N25 and check for "key-operated" 12V on the corresponding base at pin 6 of N25 | OK | Carry out step A2 |
| NOT OK | Restore the wiring between N25 and the ignition switch B1 | ||
| A2 | CHECK EARTH – Check for 0V at pin 4 of N25 | OK | Carry out step A3 |
| NOT OK | Restore the wiring between N25 and earth G143b | ||
| A3 | CHECK CONTROL/ENABLE SIGNALS – Check the following signals on the pins of N25: • 0V at pin 9, turning on the fog guard switch in B68, • 12V at pin 3, turning on the fog lamps, • 12V at pin1, turning on the low beam headlamps | OK | Insert device N25 on its base and continue with step A4 |
| NOT OK | Check connection between N25, connector 1 of G1 and the lever unit B66 | ||
| A4 | CHECK VOLTAGE – Turn on the fog guards with the low beam headlamps on or fog lamps on and check for 12V at pin 8 and 5 of N25 | OK | DEVICE N25 IS WORKING PROPERLY Check the connections with the other components |
| NOT OK | REPLACE DEVICE N25 | ||
Parts & tools for this job For 1994 Alfa Romeo 145/146
- TOOLDigital multimeterSearch: automotive digital multimeter
- PARTAssorted fuse kitSearch: car fuse assortment kit
- TOOLWire crimper and connector kitSearch: wire crimper connector kit
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