Yamaha 2005 BT1100 Supplementary Service Manual page 92

EAS00774
TROUBLESHOOTING
The battery is not being charged.
Check:
1. Main fuse
2. Battery
3. Charging voltage
4. Startor coil assembly resistance
5. Wiring (of the entire charging system)
NOTE:
• Before troubleshooting, remove the following
part(-s):
1) Seat
2) Side covers
3) Storage compartment/battery cover
• Troubleshoot with the following special tool(-s).
Engine tachometer
90890-03113
Pocket tester
90890-03112
EAS00738
1. Main fuse
• Check the main fuse for continuity.
Refer to "CHECKING THE FUSES" in
Chapter 3.
• Is the main fuse OK?
YES NO
Replace the fuse.
CHARGING SYSTEM
EAS00739
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING THE
BATTERY" in Chapter 3.
Min. open-circuit voltage
12.8 V or more at 20 °C (68 °F)
• Is the battery OK?
YES
EAS00775
3. Charging voltage
• Connect the engine tachometer to the spark
plug lead of cylinder #1.
• Connect the pocket tester (DC 20 V) to the
battery as shown.
Tester positive probe
Tester negative probe
• Start the engine and let it run at approxi-
mately 5,000 r/min.
• Measure the charging voltage.
Charging voltage
14 V at 5,000 r/min
84
ELEC
NO
• Clean the battery ter-
minals.
• Recharge or replace
the battery.
¡
battery positive terminal
¡
battery negative terminal