Buell 2003XB9S Service Manual page 540

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TESTING
Voltage Regulator Bleed Test
NOTE
Stator connector [46] and regulator connector [77] are
located under sprocket cover. for more information see
SPROCKET COVER WIRING.
1. Be sure regulator is connected to battery.
a. Check that voltage regulator connector [77] halves
are engaged.
b. Check that main fuse is not blown.
2. Locate and disconnect stator connector [46].
3. Check regulator connector using a trouble light.
a. Touch one probe to a suitable ground.
b. Touch the other to the regulator pins, one at a time.
c. If light glows, replace regulator.
Milliampere Draw Test
NOTE
Be sure accessories are not wired so they stay on at all times.
This condition could drain battery completely if vehicle is
parked for a long time. Check for this by connecting ammeter
between negative battery terminal and battery.
1. See Figure 7-23. Connect ammeter between negative
battery terminal and battery. With this arrangement, you
will also pick up any regulator drain.
2. With ignition key switch turned to OFF and all lights and
accessories off, observe amperage reading.
a. Maximum reading should be 1.6 milliamperes.
b. A higher reading indicates excessive current draw.
Any accessories must be considered and checked
for excessive drain.
NOTE
A battery with a surface discharge condition could suffer a
static drain. Correct by cleaning battery case.
Total Current Draw Test
If battery runs down during use, the current draw of the
motorcycle components and accessories may exceed output
of the charging system.
1 1
WARNING WARNING
Always turn the battery load tester OFF before connect-
ing tester cables to the battery terminals. Connecting
tester cables with the load tester ON could cause a spark
resulting in a battery explosion which could result in
death or serious injury.
1. See Figure 7-24. To check for this condition, place load
tester induction pickup or current probe pickup over bat-
tery negative cable.
2. Disconnect stator wiring from voltage regulator wiring at
the connector [46] under front sprocket cover See
SPROCKET COVER WIRING. Start the motorcycle and
run the engine at 2000 RPM.
3. With ignition and all continuously running lights and
accessories turned on (headlight on high beam), read
the total current draw.
b0325x7x
7.25
12 VDC
Battery
Figure 7-23. Milliampere Draw Test
b1093x7x
VOLTS
AMPS
12 VDC
Battery
Figure 7-24. Check Current Draw (Ignition Switch On)
4. Compare this reading to the reading obtained after per-
forming the CURRENT AND VOLTAGE OUTPUT
a. The current output should exceed current draw by
3.5 amps minimum.
b. If output does not meet specifications, there may be
too many accessories for the charging system to
handle.
5. Reconnect regulator after testing.
7.25
1.6 milliamperes
maximum
Battery negative
cable
Ignition turned
to OFF
Load tester
2003 Buell XB9S: Electrical
TEST.
7-25