Dipped headlamps lowerd and not moving
- Make
- Alfa Romeo
- Model
- GT Factory Service Manual
- Year
- 2003–2010
- Section
- Lights › Dipped headlamps lowerd and not moving
DIPPED HEADLAMPS LOWERD AND NOT MOVING
Both headlamps are lowered and not moving.
Warning: Presence of high voltage (25kV) at the gas discharge bulb connector during the first 0.7 seconds after the dipped headlamps have been turned on.
Do not switch on the dipped headlamps when the discharge lamp connector is not correctly connected.
Do not disconnect the discharge bulb connector with the dipped headlamps switched on.
Handle the discharge bulb with clean, cloth gloves and never touch the glass bulb with your fingers.
Do not reverse the polarity of the supply line for the headlamps or else irreversible damage will be caused to the control unit.
| Results of the tests | ||||
| 1 | GEOMETRY SENSOR CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
Check the front and rear geometry sensors See Test | Continue to Step 2 | Rear sensor signal cable broken | Restore the correct connection See | |
| Sensor damaged | Replace the sensor Op. Op. 5540C46 SENSOR FOR CORRECTING/ALIGNING GAS DISCHARGE LIGHTING UNITS ON REAR SUSPENSION - R R | |||
| Control unit faulty | Replace control unit Op. | |||
| 2 | SENSOR LEAD CONTINUITY CHECK | All OK | Problems met | Operation |
| Check the continuity of the front sensor lead | Continue to Step 3 | Front sensor signal lead broken | Restore the correct connection See | |
| 3 | SENSOR LEAD CHECK | All OK | Problems met | Operation |
Check the insulation of the front sensor lead See Test | Continue to Step 4 | Clock lead short circuited to 12 V or to earth, or to + supply for the actual sensor | Restore the correct insulation See | |
| Sensor damaged | Replace sensor Op. Op. 5540C42 SENSOR FOR CORRECTING/ALIGNING GAS DISCHARGE LIGHTING UNITS ON FRONT SUSPENSION - R R | |||
| 4 | CLOCK LEAD CHECK | All OK | Problems met | Operation |
Check the insulation and the continuity of the clock lead See Test See Test 5540C HEADLAMP/LIGHT CLUSTER ALIGNMENT CORRECTION DEVICES | Continue to Step 5 | Clock lead short circuited to 12 V or to earth | Repair the insulation See | |
| Clock lead broken in the joint section for both alignment correctors | Restore the continuity See | |||
| Control unit not sending clock signal | Replace control unit Op. | |||
| 5 | SENSOR LEAD CHECK | All OK | Problems met | Operation |
Check the insulation and the continuity of the sensor lead See Test | Continue to Step 6 | Sensor lead short circuited to 12 V or to earth | Repair the insulation See | |
| Sensor lead broken in the joint section for both alignment connectors | Restore the continuity See | |||
| Control unit not sending sensor signal | Replace control unit Op. | |||
| 6 | HEADLAMP ALIGNMENT CONTROL UNIT CHECK | All OK | Problems met | Operation |
Check headlamp alignment control unit connection and supply See Test | Continue to Step 7 | Control unit connector not properly connected | Restore the correct connection See | |
| Control unit faulty | Replace the headlamp alignment control unit Op. | |||
| 7 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | Dimmer not working | Replace the Body Computer Op. | |
Parts & tools for this job For 2003 Alfa Romeo GT
- PARTReplacement bulbsSearch: Alfa Romeo GT 2003 bulbs
- TOOLDigital multimeterSearch: automotive digital multimeter
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