Rolls-Royce Silver Shadow II - Page 101

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SY/Ml04 (Issue 2
6.
7.
a.
(11) If this is still intact then there is a discontinuity
(i)
in the circuit which runs from fuse number 9 to the
speed control via the micro-switches in the transmission
actuator. The cause of this fault should be
investigated and eliminated.
Switch off the ignition.
(ii) Connect a test lamp between the black loom wire (pin 1)
and a known+ 12V ignition fed source.
{iii) Switch on the ignition and check that the ON/OFF/
RESUME switch is in the OFF position. The lamp
should not illuminate.
(iv) Move the switch to ON when the lamp should illuminate.
(v) Move the switch to RESu'"ME when the lamp should
stay on.
{vi} If (iii} to (v) show no faults switch off the ignition,
disconnect the lamp and proceed to (8).
(i)
If in 6 (iv) and (v) the lamp fails to illuminate,
re-check fuse number 9.
(ii) If this is intact then there is an open circuit in
the black wire or a fault with the speed control
switch.
(iii) If in 6 (iii) the lamp illuminates then there is a
short-circuit between the black wire and the chassis.
(iv) Rectify any faults found, switch off the ignition, and
disconnect the test lamp.
(1)
Connect the test lamp between the green/brown wire
(pin 4) and a known earth point.
(11) Switch on the ignition; the lamp should stay off,
(iii) Depress the brake pedal when the lamp should illuminate.
(iv) If 8 (11) and (iii) are correct, switch off the
ignition, disconnect the test lamp and proceed to 9.
(v) If in 8 (ii) the lamp illwninates then there is
either a short circuit to+ 12V from the green/brown
wire, or the brake lights switch has failed in the
closed position. Switch off the ignition and
investigate any faults.