Current And Voltage Output Test; Voltage Output Test; Positive Regulator Cable (Red Wire); Test For Grounded Stator - Buell XB9R 2003 Service Manual

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Current and Voltage Output Test

1. Connect load tester.
a. Connect negative and positive leads to battery ter-
minals.
b. See Figure 7-25. Place load tester induction pickup
over positive regulator cable.
CAUTION
Do not leave any load switch turned on for more than 20
seconds or overheating and tester damage are possible.
2. Run the engine at 3000 RPM. Increase the load as
required to obtain a constant 13.0 VDC.
3. The current output should be 34-38 amps. Make note of
measurement for use in
TEST.
NOTE
Rider's habits may require output test at lower RPM.

Voltage Output Test

1. See Figure 7-25. After removing the load, read the load
tester voltage meter.
a. If voltage to the battery is not more than 15 VDC,
voltage output is within specifications. Investigate
other possible problems. See
ING in this section.
b. If voltage is higher, regulator is not functioning prop-
erly or connections are loose or dirty.
Stator Check
1. Turn ignition key switch to OFF.
2. See Figure 7-26. Connect an ohmmeter.
a. Locate voltage regulator connector [46] under
sprocket cover. See
ING. Disconnect from alternator stator wiring.
b. Insert one ohmmeter lead into a stator socket.
c. Attach the other lead to a suitable ground.
3. Test for continuity with ohmmeter set on the RX1 scale.
a. A good stator will show no continuity (∞ ohms)
across all stator sockets and ground.
b. Any other reading indicates a grounded stator which
must be replaced.
4. See Figure 7-27. Remove ground lead. Check resistance
across stator sockets 1-2, 2-3 and 3-1.
5. Test for resistance with ohmmeter set on the RX1 scale.
a. Resistance across the stator sockets should be 0.1-
0.3 ohms.
b. If the resistance is lower, the stator is damaged and
must be replaced.
NOTE
Verify that meter reads 0 ohms when probes are shorted
together. If not, subtract lowest value to resistance value of
stator.
7-24 2003 Buell XB9R: Electrical
TOTAL CURRENT DRAW
TROUBLESHOOT-
7.24 SPROCKET COVER WIR-
8748b
Figure 7-25. Positive Regulator Cable (red wire)
b0996x7x
Figure 7-26. Test for Grounded Stator