Rolls-Royce Corniche - Continuity Testing; Identification of Gears

Workshop Manual
Rolls-Royce Silver Shadow B Bentley T Series
Chapter M
5.
Move the limit switch 0.51 mm. (0.2 in.)
further outwards from the scribe line (dimension
A)
and tighten the switch securing screws.
6. Switch off the ignition and re-fit the wiper
motor to the mounting bracket.
7.
Check all of the wiper functions for correct
operations.
Prodedure for fault 2
Before attempting to correct this fault, ensure that
the gear
assenlbly fitted is of the latest type. The
identification of the two gears is shown in Figure
M78.
To adjust the parking switch, proceed as follows:
1.
Unscrew the rack nut and release the clamp
from the wiper motor.
2.
Rotate the motor until the parking switch is
accessible. Tighten the rack nut. This will allow
the motor to be operated and also permit
adjustment of the switch.
3. Switch on the ignition and slacken the parking
s%itch securing screws and move the switch fully
inwards towards the gearwheel. Select intermittent
wipe, and once the blades have moved, select off.
The motor will not reverse and park.
4. Caretully nlovca the limit switch outwards to a
position where
thr motor will reverse and move the
blades to the correct
parking position. Scribe a line
., -
on the motor casing at this point as shown in
Figure M77.
5. Disconnect the socket to the non-adiustable
parking switch situated beneath the main gearwheel
casing.
6.
Move the limit switch fully outwards. select
slow wipe and once the blades have moved, select
off and allow the motor to reverse and stop.
7.
Connect a circuit continuity tester across the
non-adjustable switch terminals 2 and 4 (see
Fig. M79).
8. If the previous test indicates a circuit, scribe
a line on the motor casing at that point.
9.
If no circuit exists move the parking switch
slightly inwards and select slow followed by off.
10.
Repeat this operation until circuit continuity
is indicated and scribe a line on the casing.
11.
Secure the parking switch at a point midway
between the two scribed lines.
12.
Switch off the ignition and replace the socket
in the parking switch and refit the motor to the
securing bracket.
13. Check all wiper functions for correct
operation.
Early gear Later gear FIG. M79 CONTINUITY TESTING
1 2
r \
FIG. M78 IDENTIFICATION OF GEARS
0 I-.
1 On screen parking switch
2 Circuit tester
-e
4,
R216