Brake lights and third brake light not working

Make: Lancia
Model: Ypsilon Factory Service Manual
Year: 2003–2011
Section: Lights › Brake lights and third brake light not working

‹ Prev Turn signals rh or lh side not working Next › (side) brake lights not working

Fault diagnosisBrake lights and third brake light not working

BRAKE LIGHTS AND THIRD BRAKE LIGHT NOT WORKING

The side brake lights are activated by the Body Computer Node controlled by the brake switch The third brake light is activated directly by the switch

1	BRAKE LIGHTS ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
		Results of the tests
	Check, in order: fuse; connections between DASHBOARD control unit and brake pedal switch; connections between DASHBOARD control unit and bulbs; bulb earth See E2021 BRAKE LIGHTS	Continue to Step 2	Defective component	Replace the component involved (if a fuse is involved, search for the cause of the problem)
			Connections broken	Restore the connections: See E2021 BRAKE LIGHTS
			Faulty earth	Restore the earth contact See E2021 BRAKE LIGHTS
2	CHECK ON BRAKE PEDAL SWITCH	All OK	Problems met	Operation
	Check that the brake pedal switch is fitted correctly and working See E2021 BRAKE LIGHTS	Continue to Step 3	Switch fastening / adjustment incorrect	Adjust the switch
		Continue to Step 3	Switch fastening / adjustment incorrect	Replace the switch
3	CHECKING FACIA CONTROL UNIT	All OK	Problems met	Operation
	Check the continuity of the facia control unit internal circuit See E2021 BRAKE LIGHTS	Continue to Step 4	Facia control unit circuit broken	Change the facia junction unit
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that all the brake lights come on	End of diagnosis

‹ Prev Turn signals rh or lh side not working Next › (side) brake lights not working

Parts & tools for this job For 2003 Lancia Ypsilon

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