Triumph TR6 PI Operation Manual page 450

Check control unit
NOTE: The stated output may be exceeded slightly when
the alternator is cold. To avoid misleading results, the check
should be performed with the unit as near to its normal
operating temperature as possible.
to.
Check drive belt adjustment. 86.10.05.
11. Disconnect multi-socket connectors.
12. Provide test circuit as shown.
CAUTION: The alternator contains polarity-sensitive
components that may be irreparably damaged if
subjected to incorrect polarity. Observe polarity of
alternator and battery terminals.
13. Run the engine.
14. Gradually increase the speed. At 1,500 alternator
rev/min (550 to 720 engine rev/min) the light should
be extinguished.
15. Hold the speed at approximately 6,000 alternator
rev/min (2200 to 2900 engine rev/min). The
voltmeter reading should now be steady at 14'0 to
14'4 volts.
16. If the voltmeter reading is not steady at the above
figure - and a satisfactory 'Check capacity to
produce current' has been performed - the indication
is that the control unit should be replaced.
ELECTRICAL
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Triumph TR6 Manual. Part No. 545277 Issue I
1. Alternator
2. Battery 12 volt
3. Light 12 volt - 2·2 watt
4. Voltmeter 0-20 volt
5. Earth connection to alternator body
6. This wire is only necessary for Lucas battery
sensed 15 ACR alternators. It is not required
for Lucas machine sensed 15 ACR and 17
ACR alternators.
86.10.01 Sheet 2