Yamaha FZ6-ST Supplementary Service Manual page 441

EAS00794
TROUBLESHOOTING
S Any of the following fail to light: turn sig-
nal light, brake light or an indicator light.
S The horn fails to sound.
Check:
1. backup, main, ignition, signal, and tail fuses
2. battery
3. main switch
4. wiring connections
(of the entire signaling system)
NOTE:
S Before troubleshooting, remove the following
part(s):
1. seat
2. front cowling inner panel (left and right)
3. fuel tank
4. side cover
S Troubleshoot with the following special tool(s).
Pocket tester
90890-03112, YU-3112
EAS00738
1. Backup, main, ignition, signal and tail fuses
S Check the backup, main, ignition, signal and
tail fuses for continuity.
Refer to "CHECKING THE FUSES" in chap-
ter 3.
S Are the backup, main, ignition, signal and tail
fuses OK?
YES
EAS00739
2. Battery
S 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)
S Is the battery OK?
NO
Replace the fuse(s).
8-36
SIGNALING SYSTEM
YES
EAS00749
3. Main switch
S Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the main switch OK?
YES
EAS00795
4. Wiring
S Check the entire signaling system's wiring.
Refer to "CIRCUIT DIAGRAM".
S Is the signaling system's wiring properly
connected and without defects?
YES
Check the condition
of each of the signal-
ing system's circuits.
Refer to "CHECK-
ING THE LIGHTING
SYSTEM".
EAS00796
CHECKING THE SIGNALING SYSTEM
1. The horn fails to sound.
1. Horn switch
S Check the horn switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the horn switch OK?
YES
ELEC
NO
S Clean the battery
terminals.
S Recharge or re-
place the battery.
NO
Replace the main
switch.
NO
Properly connect or
repair the signaling
system's wiring.
NO
Replace the left han-
dlebar switch.