Vaz 21213, Руководство по ремонту, Страница: 161 / 222

Indicators flasher relay
Relay 8 (Fig.7-30) (231.3747 model) is intended for intermit-
tent light signals both for direction indication and hazard flashing.
It also allows to identify a failed bulb in the direction indicator.
With good bulbs in the direction indication mode, the relay
ensures flashing warning light 7. With a failed bulb in the direction
indicators (blown bulb or broken bulb circuit), the direction indi-
cator and relevant facia warning light start flashing faster.
The relay is secured under the facia by the bolt welded to the
air intake wall. A faulty relay is not repairable and must be always
replaced with a new relay.
The relay should ensure the direction indicators flashing at a
rate of 90±30 cycles per minutes at 92 watt, ambient temperature
of - 20 to +50 ° ë and supply voltage between 10.8 and 15 volts.
Headlamp-on relay
The headlights are switched by means of relay 3 and 11
(Fig.7-28), model 113.3747-10, fitted below the instrument panel
on the left. Similar relays are used to switch the rear window heat-
ing, headlight wipe/wash.
The relay cut-in voltage at (23±5) ° ë must not exceed 8 volts,
the winding resistance should be (85±8.5) Ohms.
Horn
The vehicle is fitted with a horn of model 20.3721. The horn
is located in the engine compartment behind the radiator grill.
The horn wiring diagram is shown in Fig.7-33.
When the volume is low or the horn emits harsh sound, adjust
it using the adjustment screw on the horn body unit until a satis-
factory sound is achieved.
In the event of the horn failure, inspect all connections and
condition of the switch contacts.
Windscreen wiper/washer
General description
The windscreen wipe/wash comprises motor, linkage and
blades. The windscreen wipe/wash wiring diagram is shown in
Fig.7-34.
There are two operating modes of the windscreen wiper: con-
tinuous operation and intermittent operation, ensured by a relay
of êë-514 model.
A thermal bimetal fuse is provided to protect against the
motor overheating in the event of the blades binding to the glass
or resistance to sweep.
The washer pump is combined with the motor and is fitted to
the washer fluid container in the engine compartment. The pump
motor is operated by pulling up the right-hand lever of the steer-
ing column combination switch.
Fault diagnosis
Cause Remedy
Inoperative wiper motor and bimetal fuse, non-blown fuse 2 in
fuse and relay box
1. Motor supply wires damaged,
ends of wires in connectors cor-
roded
2. Wiper switch faulty
3. Motor brushes sticking, foul or
burnt commutator
4. Broken wires between motor
brushes and connector
5. Bimetal thermal fuse damaged
6. Motor armature winding lead
broken
Wiper motor inoperative, bimetal thermal fuse operative or fuse 2
in fuse box blown
1. Wiper arms bent or conflict with
bodywork
2. Wiper blades stuck because of
ice or snow
3. Foreign object in wiper mecha-
nism
4. Short-circuit in motor armature
winding
Wiper motor fails to operate intermittently
1. Wiper switch faulty
2. Wiper relay damaged:
- break in relay winding;
- shorted wires in contact part;
- clearance between relay breaker
contacts
159
Fig.7-33. Horn wiring diagram:
1 - inspection lamp socket; 2 - horn; 3 - horn switch; 4 - fusebox
1. Inspect and renew leads when
found damaged. Clean wire ends
2. Renew 3-stalk switch
3. Inspect, eliminate wiper blades
sticking or renew damaged compo-
nents, clean commutator
4. Check and when necessary sol-
der wires
5. Clean thermo-bimetal fuse con-
tacts or renew it.
6. Renew armature or motor
1. Examine, straighten wiper arms
or renew windscreen wiper
2. Detach blades from glass, taking
care not to damage rubber
3. Check and remove foreign object
if any
4. Renew motor or motor armature
1. Renew 3-stalk switch
2. Carry out the following:
- renew relay;
- remedy short-circuit;
- eliminate clearance, renew relay
when applicable