I06 MAIN BEAM HEADLAMPS NOT WORKING - Lancia - MUSA - eLearn

184000445 - I06 MAIN BEAM HEADLAMPS NOT WORKING

With the dipped headlamps switched on (stable position) or in the flashing mode, when the stalk unit ring nut is operated, the main beam headlamps do not work

Results of the tests

MAIN BEAM HEADLAMPS RELAY CHECK (POWER CIRCUIT)

All OK

Problems met

Operation

Swap the main beam headlamps relay (in the engine compartment junction unit) with the horn relay (the third one in the same row) and check that the main beam headlamps are working properly after the swap

Continue to Step 2

The main beam headlamps still do not work even after the swap

Continue to Step 3

REPLACING HORN RELAY (POWER CIRCUIT)

All OK

Problems met

Operation

Replace the horn relay (which, in reality, was the one for the main beam headlamps) and check that it is working properly

End of diagnosis

MAIN BEAM HEADLAMPS POWER SUPPLY CHECK (POWER CIRCUIT)

All OK

Problems met

Operation

Restore the two relays to their original positions.With the ignition ON, check that the main beam headlamps relay is correctly supplied by the battery.Then, connect to the supply for the relay from the Body Computer and check that the power supply is sent to the relay when the fog lights are activated.Also check that the electrical connections between the battery and the relay are not faulty See E2012 MAIN BEAM HEADLAMPS

Do not disconnect the relay

Continue to Step 4

No power supply from the battery

Restore the correct power supply to the relay. If necessary, replace the faulty components (if a fuse is involved, search for the cause of the problem first)

Supply enablement not provided by the Body Computer

Continue to Step 4

Connections faulty

Restore the correct connections. See E2012 MAIN BEAM HEADLAMPS

CHECK WITH DIAGNOSTIC EQUIPMENT

All OK

Problems met

Operation

Connect the Examiner to the diagnostic socket

Check:

that there are no faults in the Body Computer
the operation of the lights through active diagnosis

Continue to Step 6

Body Computer faulty

Continue according to the instructions for the diagnostic equipment

Lights not activated

Continue to Step 5

CHECK ON INDIVIDUAL LIGHTS

All OK

Problems met

Operation

Check the condition of individual bulbs and light units.

Continue to Step 6

Bulbs damaged

Replace bulbs Op. 5540B32

Front right light cluster faulty

Repair or replace front lights cluster Op. 5540B79

Front left light cluster faulty

Repair or replace front lights cluster Op. 5540B78

MAIN BEAM HEADLAMPS ELECTRICAL CIRCUIT CHECK

All OK

Problems met

Operation

Check, in order:

left and right main beam headlamp fuses
connection between stalk unit and Body Computer;
connection between Body Computer and engine compartment control unit;
connections between engine bay control unit and bulbs;
bulb earth See E2012 MAIN BEAM HEADLAMPS

Continue to Step 7

Blown fuses

Replace the fuses, then search for the cause of the problem

Connections not correct

Restore the connections See E2012 MAIN BEAM HEADLAMPS

Lamps earth defective

Restore the earth to the bulbs See E2012 MAIN BEAM HEADLAMPS

CHECK ON STEERING COLUMN SWITCH UNIT

All OK

Problems met

Operation

Check that the stalk unit is working properly See E2012 MAIN BEAM HEADLAMPS

Continue to Step 8

Stalk unit faulty

Replace the stalk unit Op. 5550A12

CHECK ON CORRECT OPERATION

All OK

Problems met

Operation

Check that the fault is no longer present

End of diagnosis

Fault persists

Replace the Body Computer Op. 5505A32