Rolls-Royce Corniche - Mixo TR 129 High & Low Note Horns (Where Fitted); Horn Circuit (All Types)-To Test; Windtone Horn WT 7 H

Workshop Manual
Rolls- Royce Silver Shadow B Bentley T Series
Chapter M
FIG. M86 WINDTONE HORN WT 7H
1 Adjustable contact
2 Vibrating contact
3 'Lucar' connectors
Horn circuit (All types)-To test
1.
Connect the horn relay terminal ' C1' to the
main battery terminal of the starter relay. If the
horns do not operate, the fault lies in the circuitry
forward of the relay.
2.
If the horns produce a poor note, check using
a voltmeter, the voltage at the horn terminal, the
minimum value is
10 Volts for satisfactory operation.
3.
To isolate a failure not produced in the
previous test, short circuit the
' W2' terminal to
earth. This isolates the push button, the lead or the
earth connection. Failure of the horn to operate
indicates a defective relay.
'Mixo' TR 129 High & Low
Note horns (where
fitted)
These horns are sealed units and maintenance is
unnecessary.
No attempt at adjustment should be made as the
horns are manufactured to the relevant
European standards