Buell S1 Lightning Workshop Manual page 299

Charging System Troubleshooting
NOTE
Whenever a charging system component fails a test and is
replaced, the system must be re-tested to be sure problem
has been corrected.
Correct as required.
Replace regulator.
Isolate damaged
component or wiring.
Isolate damaged wiring or
excessive accessories.
Replace stator.
Fail
Inspect
Fail
rotor.
Replace
Pass
rotor.
Replace
stator.
Damaged or
Fail
slipping rotor.
7-24
Fail
Fail
Perform MILLIAMP DRAW TEST (If applicable).
Fail
Fail
Perform
STATOR
Fail
CHECK.
Pass
Perform
AC
Fail
OUTPUT
TEST.
Pass
Replace regulator.
Perform CURRENT OUTPUT
TEST.
BATTERY BECOMES DISCHARGED
Test battery.
Charge or replace as required. See
BATTERY in Section 1.
Pass
Inspect regulator.
See REGULATOR INSPECTION.
Pass
Test regulator.
See REGULATOR BLEED TEST.
Pass
Pass
Perform TOTAL CURRENT DRAW TEST.
Record measurement.
Pass
Perform CURRENT OUTPUT TEST.
Record measurement and compare with
TOTAL CURRENT DRAW TEST before
proceeding.
Pass
Perform VOLTAGE OUTPUT TEST.
Pass
System tests good up to this point.
Suspect:
1. Accessories on for long periods when
vehicle is parked and not running.
2. Accessories on when vehicle is ridden
very slowly for long periods.
3. Battery self-discharge and/or acces-
sory draw because vehicle was not
operated for a long period.
SYMPTOM:
Fail
Replace
regulator.