20 · Electrical

Troubleshooting

Electrical 09 – Stop lightsTroubleshooting

NONE OF STOP-LIGHTS WORKING TEST A

NOTE for versions equipped with the Check Panel device, refer to section: "Check Panel - Stop-lights check" before carrying out the following checks.

	TEST PROCEDURE	RESULT	CORRECTIVE ACTION
	A1	CHECK FUSE - Check for damage of fuse F2 in fusebox G1	OK ▶ Carry out step A2 OK ▶ Replace fuse (20A)
A2	CHECK VOLTAGE - Verify 12V at pin 2 of the switch H3	OK ▶ Carry out step A3 OK ▶ Restore wiring between pin H5 of G1 and pin 2 of the switch H3 (RED)
A3	CHECK SWITCH - Check for correct functioning of the switch: • with brake pedal released verify 12V at pin 3; • with brake pedal depressed verify 12V at pin 1	OK ▶ Carry out step A4 OK ▶ Replace switch H3
A4	CHECK VOLTAGE - With brake pedal depressed, verify 12V at pin H9 of G1	OK ▶ Carry out step A5 OK ▶ Restore wiring between pin H9 of G1 and pin 1 of the switch H3 (RED-BLK)
A5	CHECK VOLTAGE - With brake pedal released, verify 12V at pin H12 of G1	OK ▶ See "Check Panel - Stop-lights check". OK ▶ Restore wiring between pin H12 of G1 and pin 3 of the switch H3 (RED-GRN) (from chassis N.2521 also across solder)

Parts & tools for this job For 1992 Alfa Romeo 155

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