Troubleshooting - Yamaha YFZ450S 2003 Service Manual

EBS01073

TROUBLESHOOTING

Any of the following fail to light: brake
light or an indicator light.
Check:
1. fuse
2. battery
3. main switch
4. wiring connections
(of the entire signaling system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank cover
3. side covers (left and light)
4. front fender
• Troubleshoot with the following special
tool(s).
Pocket tester
P/N. YU-03112-C, 90890-03112
EBS01043
1. Fuse
• Check the fuse for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the fuse OK?
YES NO
Replace the fuse.
SIGNAL SYSTEM
EBS01044
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20 °C (68 °F)
• Is the battery OK?
EBS01041
3. Main switch
• Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the main switch OK?
EBS01074
4. Wiring
• Check the entire signal system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the signaling system's wiring properly
connected and without defects?
Check the condition
of each of the signal-
ing system's circuits.
Refer to "CHECK-
ING THE SIGNAL-
ING SYSTEM".
8 - 34
ELEC
YES
• Clean the battery
terminals.
• Recharge or
replace the bat-
tery.
YES
Replace the
switch.
YES
Properly connect or
repair the signaling
system's wiring.
– +
NO
NO
main
NO