Main beam headlamps not working
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Lights › Main beam headlamps not working
MAIN BEAM HEADLAMPS NOT WORKING
The main beam headlamps are not working in any conditions (either in the stable lever position or flasher position);
The main beam headlamps are controlled by the Body Computer Node via a relay located in the Engine Compartment Junction Unit;
The lights can be switched on/off using the following controls:
1. Command from stalk in fixed position
2. Command from the stalk in "flasher function" unstable position.
| Test results | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Connect the Examiner diagnostic equipment to the diagnostic socket and check the following at the Body Computer Node: - error B1025 not present | End of diagnosis | Presence of error B1025 | Move on to Step 2 | |
| 2 | MAIN BEAM HEADLAMPS RELAY CHECK | All OK | Problems encountered | Operation |
| Check the condition of the main beam headlamps relay (relay T4 in the engine compartment junction unit) | Move on to Step 3 | Relay defective | Replace the relay | |
| 3 | CHECK ON OPERATION OF ENGINE COMPARTMENT JUNCTION UNIT FUSES | All OK | Problems encountered | Operation |
| Check that fuses F16 and F17 in the engine compartment junction unit are working properly | Move on to Step 4 | Fuses blown | Replace the fuses (and find out what could have caused them to blow). | |
| 4 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Keeping the diagnostic equipment connected, check in active diagnosis that the main beam headlamps are working properly | Move on to Step 7 | Main beam headlamps not working | Move on to Step 5 | |
| 5 | BODY COMPUTER CONNECTIONS CHECK | All OK | Problems encountered | Operation |
| Check for distorted terminals or missing connections in the Body Computer | Move on to Step 6 | Missing connections / bent pins | Renew the correct connections | |
| 6 | CHECK ON OPERATION OF BULBS | All OK | Problems encountered | Operation |
| Check that the main beam headlamp bulbs are working properly | Move on to Step 9 | Filament for one of the bulbs broken | Replace the bulb Op. 5540B24 MAIN BEAM BULB (ONE) FOR ONE HEADLAMP/LIGHT CLUSTER LH OR RH - R.R | |
| 7 | ELECTRICAL SYSTEM CHECK | All OK | Problems encountered | Operation |
Check the continuity of the connections between the control on the steering column switch unit and the Body Computer Node | Move on to Step 8 | Interruption or no insulation for the connecting cables | Restore the electrical connection | |
| 8 | MAIN BEAM HEADLAMPS CONTROL OPERATION CHECK | All OK | Problems encountered | Operation |
| Check that the main beam headlamps control on the stalk is working | Move on to Step 9 | Steering column switch unit internal interruption | Replace the steering column switch unit | |
| 9 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists | Replace body computer | |
Parts & tools for this job For 2005 Fiat Grande Punto
- PARTReplacement bulbsSearch: Fiat Grande Punto 2005 bulbs
- TOOLDigital multimeterSearch: automotive digital multimeter
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