Contents: Headlight adjustment ↓ Headlight Hydraulic Corrector ↓ Three-lever switch ↓ Headlight relay ↓ Direction indicator and hazard…↓
Headlight adjustment
It is carried out by rotating screws 1 and 5 (Fig. 244), which turn the optical element in the vertical and horizontal planes. It is most convenient to adjust the headlights using sliding optical devices. If there are none, then the adjustment can be carried out using the screen.
Place the fully fueled and equipped vehicle with a load of 75 kgf on the driver's seat on a flat horizontal surface 5 m from a smooth wall or any screen (shield size about 2x1 m) so that the car's axis is perpendicular to it. Before marking the screen, make sure that the air pressure in the tires is normal, and then rock the car from the side to settle the suspension springs.
Draw vertical lines on the screen (Fig. 245): axial O and lines A and B passing through points E corresponding to the centers of the headlights. These lines should be symmetrical relative to the axial line of the car. At a height corresponding to the distance of the centers of the headlights from the floor, draw line 1, and below it, 75 mm, line 2 of the centers of the light spots.
Set the headlight range control knob on the instrument panel to the zero position (leftmost). If the car does not have a headlight range control, turn the adjusting screw 4 (see fig. 244) to the far left position.
Turn on the low beam headlights. Sequentially, first for the right headlight (the left one is covered with a piece of cardboard or dark fabric, or turned off), and then for the left (the right one is closed) adjust the headlight beams with screws 1 and 5. For correctly adjusted headlights, the upper edge of the light spots should coincide with line 2 (see fig. 245), and the points of intersection of the horizontal and inclined sections of the light spots are with lines A and B.
Headlight Hydraulic Corrector
If the headlight tilt angle has increased and the adjusting screw on the headlight unit cannot bring it back to normal, then check for fluid leaks from the cylinders or tubes of the hydraulic corrector. Remove the actuator cylinders from the headlight units and check the working stroke of the rods, which should be (11±0.5) mm.
The design of the hydraulic corrector is non-separable, and in case of damage it is replaced as a whole, together with the cylinders and tubes. To replace, disconnect the tube clamps from the wire fastening brackets. Remove the handle from the master cylinder and unscrew the nut that fastens it to the instrument panel. Disconnect the actuator cylinders from the headlights and push them with the seal into the car interior. Install the new hydraulic corrector in the reverse order.
Three-lever switch
The switch is secured with a clamp to the steering shaft bracket. To remove the switch, perform the following procedure. Remove the steering wheel, then the two halves of the steering shaft trim cover. Remove the instrument panel and disconnect the switch wires from the vehicle's wiring harness. Loosen the clamp and remove the switch. Install the switch in the reverse order.
Headlight relay
To turn on the headlights, relays of the 112.3747 or 113.3747 type are used, installed in the mounting block. Relay 112.3747 has two fixed contacts, one of which is initially closed with the anchor contact. Relay 113.3747 has only one fixed contact, which closes with the anchor contact when the relay is turned on. The characteristics of both relay types are the same. The relay turn-on voltage at a temperature of (23±5)°C is no more than 8 V, and the winding resistance is (85±8.5) Ohm.
Direction indicator and hazard warning flasher relay
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The flasher relay is installed under the instrument panel on a bolt welded to the air intake box wall. Flasher relays 23.3747 and 231.3747 must ensure flashing of the direction indicator lamps with a frequency of 90±30 cycles per minute at an ambient temperature of -40 to +65°C and a voltage of 10.8 to 15 V.
If one of the turn signal lamps burns out, then the 231.3747 flasher relay should double the flashing frequency of the turn signal indicator lamp. In this case, the 23.3747 flasher relay creates a constant glow of the indicator lamp, without flashing.