Alternator Stator; Pinpoint Tests - Triumph Rocket III Classic Service Manual

Electrical System
Alternator Stator
The stator is an assembly of 18 coils, arranged in to three
phases. It is possible to check for continuity and short
circuits through the coils and to earth
Note:
• Only repair the stator harness between the
rectifier and where the harness goes into the
crankcase.
Fault
Possible cause
Battery not charging Fuse 11
Battery
Alternator
Rectifier/Regulator
Pinpoint Tests
Test
Result
1 Check cable and terminal integrity:
OK
- Battery positive
(+)
- Battery negative (-)
- rectifier/regulator black connector pin 1 Faulty
- rectifier/regulator black connector pin 3
- rectifier/regulator grey connector pin 1
- rectifier/regulator grey connector pin 2
- rectifier/regulator grey connector pin 3
2 Check cable continuity
OK
- rectifierlregulator black connector pin 1 to
battery lead negative connector
- rectifier/regulator black connector pin 3
battery lead positive connector
• Do not attempt to repair the stator coils.
• If the battery is not fully charged, the charging
voltage may be lower than specified when
checking at 2000 rpm.
• Ensure all additional accessories (auxiliary
lights, heated grips etc.> are switched off.
Action
Check the condition of fuse 11:-
Check the condition of the battery.
Test the battery using the BatteryMate
150-9. Refer to the instructions
supplied with the BatteryMate 150-9.
Ensure the battery is serviceable:-
Proceed to pinpoint test 1:-
Test the rectifier/regulator (see page
18-30)
Action
Disconnect the battery leads, negative (black)
lead first. Disconnect rectifier/regulator black
connector and proceed to test 2
Rectify fault, proceed to test 4
Reconnect the battery leads, positive (red)
lead first. Reconnect the rectifier/regulator
black connector. Disconnect the rectifier/
regulator grey connector and proceed to test
3
Open circuit
Locate and rectify wiring fault, proceed to test
4
3 Check resistance through the coils:
0.40 to 0.60
Proceed to test 2
- Alternator pin 1 to pin 2 Open circuit or If the fault is between the rectifier and the
- Alternator pin 2 to pin 3
short circuit crankcase, repair the harness. Proceed to test
- Alternator pin 3 to pin 1
4
If the fault is after the crankcase, replace the
unit. Proceed to test 5
4 Reconnect the harness and run the engine. 13.5V - 15V
Action complete - quit test
Check the charging voltage at 2000 rpm:
Fault still present Disconnect the rectifier/regulator
grey
connector and proceed to test 5
18.28
SelVice Manual - Rocket Ill/ Classic / Touring