General description

GENERAL DESCRIPTION

Some versions of the car offer the possibility to adjust the headlight beam in relation to the load directly from the driver's seat.

In this way the problem or inconveniences caused by incorrect headlamp aiming is avoided and the delicate task of direct lamp adjustment is simplified (this is not substituted by the electrical device but integrated with it).

The adjustment device consists of a motor fitted on each of the two headlamps which suitably slopes them to lower the beam when the car is heavily loaded and raise it when the load is lightened.

The driver operates the system directly by turning a knob on the dashboard, which allows four positions to be chosen according to the following table:

FUNCTIONAL DESCRIPTION

The headlamp aiming device B69 is supplied at pin 56b by a line leading from the side lights circuit: this line receives voltage only when the side lights are on. The same supply (pin 58) turns on the led inside device B69 itself which illuminates the ideogram identifying the function.

Pins 31 of device B69 are earthed, while the adjustment signal obtained by pressing the four-position selection knob leads from pin G. This signal varies the output voltage through a potentiometer (100% voltage at position "0"; with voltage decreasing for the successive positions).

Motors P35a and P35b are formed by a motor in the strict sense of the word controlled by a transducer and an electronic control unit which establishes the stroke on the basis of the voltage of the adjustment signal reaching pins G from device B69.

The devices are supplied, at pin 56b, by the same line that supplies device B69, (up to chassis no. ... protected by fuse F6 of box G1 "A" and by fuse F7 of box G1 "C", while pins 31 are earthed.

The system can be operated only when the side lights are on; it is completely de-activated when they are off.

NOTE: for safety reasons the system is designed so that in the event of a failure it cannot be moved to a higher position than the one it is already at.