Yamaha MT-09 2021 - Troubleshooting

8-27
LIGHTING SYSTEM
EAS30499
TROUBLESHOOTING
Any of the following fail to light: headlight, auxiliary light, high beam indicator light, taillight, license light
or meter light.
TIP
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Fuel tank side cover
3. Fuel tank center cover
4. Fuel tank
5. Air filter case
6. Headlight assembly
1. Check the fuses.
(Main, headlight, ignition 1, ignition
2, backup 1, backup 2, and signal-
ing system)
Refer to “CHECKING THE FUS-
ES” on page 8-55.
NG→ Replace the fuse(s).
OK↓
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 8-56.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3. Check the main switch.
Refer to “CHECKING THE
SWITCHES” on page 8-53.
NG→ Replace the main switch/immobilizer unit.
OK↓
4. Check the dimmer switch.
Refer to “CHECKING THE
SWITCHES” on page 8-53.
NG→
The dimmer switch is faulty. Replace the
handlebar switch (left).
OK↓
5. Check the pass switch.
Refer to “CHECKING THE
SWITCHES” on page 8-53.
NG→
The pass switch is faulty. Replace the
handlebar switch (left).
OK↓
6. Check the entire lighting system’s
wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-23.
NG→
Properly connect or repair the lighting sys-
tem’s wiring.
OK↓