Workshop Manuals Factory service & repair Alfa Romeo
01 General data and specifications02 Engine (Twin Spark, JTD and V6)03 Clutch04 Gearbox (manual, Selespeed and Q-System)05 Front axle06 Brakes, ABS and traction control07 Steering08 Suspension and wheels09 Heating, air conditioning and washers10 Electrical equipment11 Body12 Body panels and reinforcement13 Wiring diagrams14 Connectors and pin-outs15 Wiring harnesses16 Fault diagnosis17 Special tools
Alfa Romeo 156 Factory Service Manual (1997-2002)13 · Wiring diagrams
13 · Electrical

E2020 Turn/ hazard lights (Euro3)

Make
Alfa Romeo
Model
156 Factory Service Manual
Year
1997–2002
Section
Exterior lighting › E2020 Turn/ hazard lights (Euro3)
Wiring diagramsE2020 Turn/ hazard lights (Euro3)

E2020 Turn/ hazard lights (Euro3)

Description

The direction indicators and hazard warning lights delimit the outer dimensions of the car.

The left and right direction indicators are operated by raising or lowering the appropriate lever on the stalk unit.

The hazard warning lights (right and left direction indicators operated simultaneously) are turned on by the pressing the red button at the centre of the dashboard.

The direction indicators work with the ignition on, while for safety reasons, the hazard warning lights can be turned on at any time, as they are supplied directly from the battery.

The circuit for the direction indicators and hazard warning lights is protected by a single fuse.

Two warning lights on the instrument panel (rev counter module), which also flash, show when the right or left direction indicator is on.

The red hazard warning light button contains two leds: the first green one is ignition-operated and lights up the specific symbol; The second red light comes on intermittently when the hazard warning lights are operated.

The hazard warning lights are also operated by the door opening remote control, which controls a special relay.

Description of operation

The circuit is controlled by the hazard warning lights switch H20.

The intermittent device is located on the steering column switch unit H5. It is connected to earth at pin 7 of connector A and receives a supply signal at pin 7 of connector D through switch H20:

  • when the hazard lights are not on, the supply is controlled by the ignition (INT/A) from fuse F6 of the additional fuse box B98B.
  • when the hazard warning lights are switched on, the supply is direct from the battery through fuse F9 of the junction unit B1 and maxifuse J/B1of fuse B99.

The intermittent device produces a signal which supplies the switch for the direction indicators on the steering column switch H5 and the switch H20.

The operation, in one direction or another, of the steering column switch lever H5 supplies the right direction indicators (F11, F21, F31) or the left ones (F10, F20, F30).

At the same time the warning light, located in the rev counter module E15, comes on.

Pressing the switch H20 closes three contacts which simultaneously supply all the lights (right branch and left branch) close and the red LED in the actual switch which lights up the symbol.

In switch H20 there is also a green LED which comes on when the ignition is switched on (INT/A).

All the hazard warning lights are also operated by alarm remote control receiver M35, which controls the special relay J43.

Wiring diagram

Wiring diagram E2020 TURN/ HAZARD LIGHTS

Components

CodeComponentSee
B01Junction unit description 5505A
B05MAXI FUSE-1 box
B10Key-dependent supply fuse (INT/A)
B98Supplementary fuse box description 5505A
B99Maxifuse box on battery
C10Front left earth description 5505A
C11Right front earth description 5505A
C20Passenger side dashboard earth description 5505A
C30Left rear earth description 5505A
C31Rear right earth description 5505A
D02Front /crossmember connection
E15Rev counter description 5560B
F10Left headlamp description 5540B
F11Right headlamp description 5540B
F20Left side repeater description 5550C
F21Right side repeater description 5550C
F30Rear lights cluster left (fixed part) description 5540A
F31Rear right lights cluster (fixed part) description 5540A
H01Ignition switch description 5520A
H05Steering column switch unit description 5550A
H20Hazard warning lights switch description 5550C
J43Direction indicators / hazard warning lights relay
M30Alarm control unit description 5580E
M35Alarm remote control receiver description 5580E

Component location

Location of components, E2020

Parts & tools for this job Staging For 1997 Alfa Romeo 156

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