Troubleshooting - Yamaha MTN850-A 2017 Service Manual

EAS30499

TROUBLESHOOTING

Any of the following fail to light: headlight, high beam indicator light, taillight, license light or meter light.
TIP
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Air scoop
3. Fuel tank cover
4. Fuel tank
5. Rear side cover
6. Headlight assembly
1. Check the each bulbs and bulb
sockets condition.
Refer to "CHECKING THE BULBS
AND BULB SOCKETS" on page
8-156.
OK
2. Check the fuses.
(Main, headlight, ignition and signal-
ing system)
Refer to "CHECKING THE FUSES"
on page 8-156.
OK
3. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-158.
OK
4. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-153.
OK
5. Check the dimmer switch.
Refer to "CHECKING THE
SWITCHES" on page 8-153.
OK
6. Check the pass switch.
Refer to "CHECKING THE
SWITCHES" on page 8-153.
OK
Replace the bulb(s) and bulb socket(s).
NG
Replace the fuse(s).
NG
• Clean the battery terminals.
• Recharge or replace the battery.
NG
Replace the main switch/immobilizer unit.
NG
The dimmer switch is faulty. Replace the
handlebar switch (left).
NG
The pass switch is faulty. Replace the
handlebar switch (left).
NG
8-19
LIGHTING SYSTEM