Yamaha MT-03 Service Manual page 344

EAS27260
TROUBLESHOOTING
Any of the following fail to light: headlight (high beam), headlight (low beam), high beam indicator
light, taillight, license plate light, auxiliary light or meter light.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Seats
2. Side panels (left and right)
3. Fuel tank
4. Battery cover
5. Headlight assembly
1. Check the condition of each bulb
and bulb socket.
Refer to "CHECKING THE
BULBS AND BULB SOCKETS"
on page 8-46.
OK
2. Check the fuses.
(Main, headlight and parking
lighting)
Refer to "CHECKING THE
FUSES" on page 8-48.
OK
3. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-49.
OK
4. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-43.
OK
5. Check the dimmer switch.
Refer to "CHECKING THE
SWITCHES" on page 8-43.
OK
6. Check the pass switch.
Refer to "CHECKING THE
SWITCHES" on page 8-43.
OK
7. Check the headlight relay (on-off).
Refer to "CHECKING THE
RELAYS" on page 8-51.
Replace the bulb(s) and bulb socket(s).
NG
Replace the fuse(s).
NG
• Clean the battery terminals.
NG
• Recharge or replace the battery.
Replace the main switch/immobilizer unit.
NG
Replace the left handlebar switch.
NG
Replace the left handlebar switch.
NG
Replace the headlight relay.
NG
8-17
LIGHTING SYSTEM