Windscreen Wipers
Windscreen Wiper Diagrams:
Windscreen Wiper Components:
Locations of components
7 Earthing point
On the left-hand wheel housing
8 Lighting relay
In the electrical distribution box behind the glove compartment (1987)
21 Ignition switch relay
In the electrical distribution box behind the glove compartment
22A Fuse board
Behind the access panel in the glove compartment
23 Flasher relay
In the electrical distribution box behind the glove compartment
57 Three-pole connector
At the windscreen wiper motor
59 Two-pole connector
At the windscreen wiper motor
61 Windscreen wiper stalk switch
On the right-hand side of the steering column
62 Windscreen wiper motor
On the left-hand side of the bulkhead
63 Washer motor
On the washer fluid container, at the left- hand front wheel housing
83 Relay for intermittent operation of the wipers
In the electrical distribution box behind the glove compartment
113 Relay/time-delay relay for the rear window heater
In the electrical distribution box behind the glove compartment
147 Ignition pulse amplifier
In the electrical distribution box behind the glove compartment
151 Time-delay relay for the interior lighting
In the electrical distribution box behind the glove compartment
155 Relay,AC/ACC
In the electrical distribution box behind the glove compartment
156 Time-delay relay, AC/ACC
In the electrical distribution box, behind the glove compartment
158 Negative distribution terminal
In the electrical distribution box behind the glove compartment
231 Distribution terminal +54
In the electrical distribution box behind the glove compartment
270 Shift-up indication relay
In the electrical distribution box behind the glove compartment
Operation
The windscreen wipers of the car can run at two speeds and have an intermittent operation function. The system also includes the windscreen washers.
The supply is taken across fuse 8 to switch 61 for the windscreen wipers, terminal 53A of the wiper motor and relay 83 for intermittent operation.
When switch 61 is in position J (intermittent operation), current will flow from terminal J to the intermittent operation relay, which will thus be energized.
The relay contacts will close, and current will flow from terminal 53M to terminal 31B of the switch, through the switch and then to terminal 53 of the wiper motor. The wiper motor will now run intermittently. The intermittent operation relay determines the frequency at which the wiper motor will run.
When the switch is in position I, current will flow from terminal 53 to terminal 53 of the wiper motor. The motor will run at low speed. This also applies to position T, but in this position the switch is spring- loaded.
When the switch is in position II, current will instead flow from terminal 53B to terminal 53B of the wiper motor. The motor will now run at high speed.
The wiper motor incorporates a mechanically actuated switch. This controls the supply, so that the wiper motor will always return to the parked position after the circuit has been opened by the stalk switch.
This is due to the fact that the wiper motor is then supplied from terminal 53A through the built-in limit switch. The current flows through the limit switch, through the intermittent operation relay and the stalk switch, and then back to the windscreen wiper motor.
When the wipers are in the parked position, this limit switch will open, and if terminals 53 and 53B are not live, the motor will stop.
Washing will start when the stalk switch is moved towards the steering wheel rim (position P). The washer motor will then be energized from terminal P of the stalk switch.
If the stalk switch is moved towards the steering wheel and released, the wipers will automatically sweep the windscreen four times.
Fault-tracing hints
The windscreen wipers will become operative as soon as the ignition switch is set to the drive position.
1. Check fuse 8 and check that the supply to it is live.
2. Check the connectors, wiring and earth connections.
3. Check that the terminals are live in the positions indicated below:
Position T is identical to position I, but spring loaded. Position P is operative in all positions (J, 0, T, land II). Position P is indicated in the table when switch 61 is in position 0.