Rear Headlight View; Wiring Diagram And Optical Cluster Connector Pinout; Automatic Headlight Position Corrector - Alfa Romeo 159 Training Material

ELECTRICAL
SYSTEM
Warm-up The ballast adjusts brightness for approximately two minutes detecting the physical state of the
bulb and its impedance (closed loop).
Steady state: The light beam is continuously controlled in a closed loop also during steady state conditions.

9.8.2 Rear headlight view

1. Headlight power 14-pin connector
2. Headlight horizontal axis adjustment screw
3. Headlight vertical axis adjustment screw
4. ECU

9.8.3 Wiring diagram and optical cluster connector pinout

Headlight power 14-pin connector
PINOUT:
1. Dipped-beam headlight control
2. Main-beam headlight control
3. Side light control
4. Direction indicator control
9. ECU key-on power
10. Speedometer signal (to master only)
11. K diagnostic line
12. Serial line
13. ECU ground connection
14. Bulb ground connection

9.8.4 Automatic headlight position corrector

Due to the high brightness output by the bulb, the vehicle is fitted with an automatic headlight trim corrector to
prevent dazzling oncoming vehicle drivers when the trim changes. The device works in the following conditions:
static for load distribution
dynamic for acceleration and deceleration.
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