
Continuous operation of wiper blades in intermittent mode
1. Wiper relay breaker winding
blown
2. Motor gear cam does not oper-
ate limit switch spring plate
3. Foul motor limit switch contacts
4. Foul wiper relay breaker con-
tacts
Wiper stops in intermittent mode. Blades do not stop
at park position
Motor limit switch contacts cor-
roded or close incompletely
Blades inoperative with motor running
1. Motor gear teeth broken
2. Loose crank fitting to motor
gear shaft
Windscreen wiper - removal and refitting
The repair of the wiper is basically restricted to straightening
the deformed arms and rods or their renewal. A failed motor must
be renewed. The overhaul of the motor is restricted to replace-
ment of gears, cleaning of commutator and adjustment of limit
switch. To remove the windscreen wiper:
- withdraw the blades complete with the arms, open the bon-
net and disconnect the leads from the battery and wiper motor;
- undo the connector nuts and remove them together with
washers and shims;
- undo the motor bracket retaining nut, withdraw the wiper.
When necessary, take the motor off the bracket and disman-
tle the linkage on the work bench.
Refitting is a reversal of the removal procedure.
160
Fig.7-35. Windscreen wiper motor components:
1 - cover; 2 - panel; 3 - drive gear; 4 - steel washer; 5 - tekstolite washer; 6 - retainer; 7 - housing; 8 - armature; 9 - crank; 10 - circlip; 11 - protective cap; 12 - spring wash-
er; 13 - sealing ring; 14 - shim; 15 - thrust washer; 16 - motor cover
Fig.7-34. Wiring diagram for windscreen wipe/wash :
1 - windscreen washer motor; 2 - windscreen wiper motor; 3 - ignition switch; 4 - ignition relay; 5 - fusebox; 6 - windscreen wipe/wash switch; 7 - pin assignment of switch
connector; 8 - windscreen wiper relay; 9 - pin assignment of wiper relay and motor connectors
Clean switch contacts or bend limit
switch plate
1. Renew gear
2. Check, tighten crank retaining nut
in its end position
1. Renew wiper relay
2. Bend switch plate so cam can
operate plate
3. Clean limit switch contacts
4. Clean breaker contacts or renew
relay
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