Workshop Manuals Factory service & repair Alfa Romeo
01 General information02 Specifications03 Manufacturing data and tolerances04 Tightening torques05 Fluids and lubricants06 Maintenance07 Diagnostic checks08 Engine09 Clutch10 Gearbox and differential11 Axles and driveshafts12 Brakes13 Steering14 Suspension and wheels15 Heating, air conditioning and auxiliary units16 Electrical equipment17 Body fittings18 Body panels and frame19 Wiring diagrams and electrical functions20 Wiring harnesses21 Connectors and pin-outs22 Fault diagnosis23 Special tools
Alfa Romeo GT Factory Service Manual (2003-2010)19 · Wiring diagrams and electrical functions
19 · Electrical

Brake lights - functional description

Make
Alfa Romeo
Model
GT Factory Service Manual
Year
2003–2010
Section
Interior lighting › Brake lights - functional description
Wiring diagrams and electrical functionsBrake lights - functional description

BRAKE LIGHTS - FUNCTIONAL DESCRIPTION

Functional description

The supply for the switch

I30

is controlled by the ignition (INT) from the line for fuse F37 of the underdashboard control unit

B2

: when the brake pedal is pressed, the switch closes and sends the ''N.A.'' signal to the Body Computer

M1

, pin 2 of connector F.

The ''ignition ON'' signal (INT) for the switch H1 reaches the underdashboard control unit

B2

at pin 11 of connector H and from there moves on to the Body Computer

M1

(pin 9 of connector F).

The Body Computer

M1 controls the supply for the brake lights in the light clusters F30 (left) F31A (right) from pins 32 and 33 of connector E.

The Body Computer

M1

is connected, via the CAN line, to the instrument panel

E50

to manage the ''lights failure'' warning light if there is a failure in the circuit.

The switch

I30 directly controls the centre rear light cluster F40 via the underdashboard control unit B2, pin 5 of connector D

Parts & tools for this job For 2003 Alfa Romeo GT

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