Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Electrical System Diagnosis Manual, Volume 3 (1994-2001)01 · 145 electrical system diagnosis
01 · Diagnostics

Faultfinding table

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Horns › Faultfinding table
145 electrical system diagnosisFaultfinding table

FAULTFINDING TABLE

Failure Component to be checked
F2 O2 I3 B68
Horns failing to work ● ● ● ●
Horns working badly (out of tune) ●

CHECKING COMPONENTS

Horns control (in B68)

Versions without airbag

Steering wheel cover with springs, earth plate, special connection, and lever unit B68.

The three springs (1) on the steering wheel cover connect the earth plate (3) to earth through the special connection (2); the plate is in turn connected with contact (4) on the lever unit B68.

Versions with airbag

Steering wheel with horn pushbuttons, clock spring cable, control switch, airbag connector G383, and module connector R23.

In cars with airbag the sliding contact is replaced by the clock spring cable (2) which connects the steering wheel to the steering column.

The horn pushbuttons (3) are connected to connector (5) (the left one is connected to the right one by a wire inside the steering wheel).

The control switch (1) is pressed through the clock spring cable and the ignition switch as for the versions without airbag.

N.B. To remove the airbag connector G383 (6) and the module connector R23 (4) extreme caution must be used: see the "Airbag" section and Group 70 - "SAFETY BELTS AND ACCESSORIES"

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

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.