Triumph TR6 PI Operation Manual page 484

KEY WARNING SYSTEM
- Description
Later U.S.A. market vehicles only.
86.58.00
ELECTRICAL
This system is designed to discourage leaving the
ignition key in the lock with the vehicle unattended. While
it should prevent the encouragement of theft it is not a
comprehensive anti-theft device.
The system is actuated by opening the drivers door
when the ignition key is still in the lock. When the system is
actuated a buzzer provides an audible intrusion.
The system is cancelled when the ignition key is
removed from the lock or when the drivers door is closed.
The drivers door switch in the circuit is a 'double
function' component with two individual contact sets. One
set controls the electrical supply to the key warning circuit
and key light circuit. The second set provides an earth
return for the transmission tunnel lamp circuit.
The key switch is built into the steering column lock
unit. Failure of the switch would necessitate replacement of
the steering column lock.
A diode in the circuit enables the key warning system
and the seat belt warning system to use the same audible
buzzer unit.
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Triumph TR6 Manual. Part No. 545277 Issue I
86.58.00