Headlights include:

- side light lamps;

- turn signal lamps;

-low beam lamps;

- high beam lamps;

- adjusting devices (for the initial installation of headlights);

- an electronic-mechanical corrector (for adjusting the beam angle of the dipped and main beam depending on the vehicle load).

The inclusion of the overall set and headlights is carried out by the central headlight switch. Switching the headlights (far-near) and turning on the direction indicators is carried out by the steering column switch.

Headlights GAZ-2705Headlights GAZ-2705

The initial position of the headlights is set with knobs 3 and 5 (Fig. 2).

To adjust the headlights depending on the load of the car, electronic-mechanical correctors are installed in the headlights, allowing the driver to change the angle of the low beam and high beam.

Changing the inclination of the light beam is carried out by the handwheel 1 (see Fig. 1) of a special electronic unit on the instrument panel.

When the car is not loaded, the number "0" on the control knob must be aligned with the "-" mark on the control unit body.

When the car is fully loaded, with the “–” mark, you must combine:

- the number "1" on the handle for buses with 8 (9) passenger seats;

- number "2" for vans and buses with 12 (13) passenger seats.

Adjust the angle of the headlight beam by changing the position of the headlight reflectors of the electric motor with gearboxes and a servo system installed in the headlight housings.

When the handwheel of the control unit is turned, power is supplied to the electric motors, which through the gearboxes turn the headlight reflectors to a certain angle.

The angle of rotation of the reflectors is determined and controlled by the sensors of the servo system depending on the position of the control unit.

GAZ-2705 headlights

The headlights must be adjusted using the screen (Fig. 3) in the following order:

- check the tire pressure, if necessary, bring it to normal;

- install an unloaded car at a distance of 5 m from the screen;

- turn the control knob of the electronic corrector to position "0";

- turn on low beam;

- adjust the light beams with handle 3 (see Fig. 2) and a Phillips screwdriver through socket 5 in turn for each headlight.

For adjusted headlights, the horizontal section of the cut-off line must be aligned with the X-X line (Fig. 3), the inclined sections of the cut-off line must correspond to fig. 3. A (marked on the diffuser "AL") and fig. 3. B (marked on the diffuser "OSVAR"), and the points of intersection of the horizontal and the beginning of the inclined sections of the cut-off border - with the lines G - G and D - D.

During operation, it is necessary to monitor the serviceability of the lamps. Lamps with dark bulbs must be replaced.

To replace low and high beam lamps and clearance lamps, it is necessary to remove covers 4 and 7 - see fig. 2 (on the headlight part, these covers can be combined into one.

To remove it, turn the spring holder). To replace the direction indicator bulbs, turn bulb holder 2.

1. Lenses of block headlights marked "OSVAR" are made of plastic, therefore it is unacceptable to clean them from dust and dirt using various fuels, other active substances and liquids, as well as dry wiping with brushes and rags.

2. When installing a halogen lamp in the headlight, do not touch the bulb with your fingers in order to avoid a decrease in the luminous flux or destruction of the bulb during operation.

Central light switch

The central light switch has three fixed positions.

When moving the stem, it must be clearly fixed. The force of moving the rod should be in the range of 10-45 N (1.0-4.5 kgf).

Maintenance

The switch is checked using a test lamp according to the vehicles electrical circuit.

In positions I and II of the stem and turning it clockwise, lamp 3 should light up;

when the stem is turned counterclockwise, lamp 3 should decrease its brightness, and go out when it stops. The voltage drop across the switch terminals must not exceed 0.01 V at a load of 1.0 A.