Workshop Manuals Factory service & repair Alfa Romeo
01 145 electrical system diagnosis02 146 electrical system diagnosis03 ABS, Alfa Romeo Code and engine management
Alfa Romeo 145/146 Electrical System Diagnosis Manual, Volume 3 (1994-2001)02 · 146 electrical system diagnosis
02 · Diagnostics

General description

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Stop Lights › General description
146 electrical system diagnosisGeneral description

GENERAL DESCRIPTION

The car stop lights are operated each time the brake pedal is pressed; they are located at the rear in the side lights. The lights are turned on automatically through the switch on the brake pedal.

The circuit is protected by a special fuse.

The braking signal from the switch is also sent to the ABS system control unit which "recognizes" the situation and controls braking accordingly (see "ABS").

N.B.: In the versions on which a radio is installed, an anti-disturbance condenser is fitted on the switch to prevent interference in the area of the actual switch.

FUNCTIONAL DESCRIPTION

The stop lights circuit is supplied directly by battery voltage via fuse F2 of fusebox G1 (box "A" and "B"). For box "C" it receives the "key-operated" supply via fuse F15 of box G1.

The stop lights switch H3 comprises a contact which closes when the brake pedal is pressed, through which the stop lights are supplied in the rear side lights E19 (right), E20 (left).

For certain Versions/Markets the third central stop light E28 is foreseen

COMPONENTS AND CONNECTORS

RH rear light E19 A LH rear light E20 A
RH rear light wiring diagram
1BLK 4
6BLK • G63c
2 1RED-BLK • G1 C
1RED-GRN • G307
1RED • G1 C
6BLK • G63b 1BLK
Third central stop light E28 Fusebox G1
1RED-GRN • G307
RED-GRN
1RED • G1 C
1BLK • G307
10RED • C56
Fusebox G1 C
1RED-BLK • E19 A 10
1RED • E20 A 1RED
1RED-GRN • G307
1RED-BLK • E19 A 9
1RED • E20 A 4
1RED-GRN • G307

Parts & tools for this job For 1994 Alfa Romeo 145/146

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