Troubleshooting - Yamaha YZF-R125 Service Manual

YamahaR125.COM
EAS27290

TROUBLESHOOTING

• Any of the following fail to light: turn signal lights, brake light or indicator lights.
• The horn fails to sound.
• The fuel gauge fails to operate.
• The speedometer fails to operate.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Seats
2. Fuel tank
3. Left upper side cowling
4. Right side panel
5. Left lower side cowling
1. Check the fuses.
(Main, ignition, and signaling sys-
tem)
Refer to "CHECKING THE FUS-
ES" on page 8-63.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-64.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-59.
OK ↓
4. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-19.
OK ↓
Check the condition of each of the sig-
naling system circuits. Refer to
"Checking the signaling system".
Checking the signaling system
The horn fails to sound.
1. Check the horn switch.
Refer to "CHECKING THE
SWITCHES" on page 8-59.
OK ↓
NG →
Replace the fuse(s).
NG →
• Refill battery fluid.
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Replace the main switch.
NG →
Properly connect or repair the signaling
system wiring.
NG →
The horn switch is faulty. Replace the left
handlebar switch.
8-21
SIGNALING SYSTEM