Yamaha YFM660 01 User Manual

8 - 20
–+ELECCHARGING SYSTEM
EB804010
TROUBLESHOOTING
Procedure
Check:
1.Fuse
2.Battery
3.Charging voltageIF THE BATTERY IS NOT CHARGED:
4.Charging coil resistance
5.Wiring connections 
(the entire charging system)
OTE:

Remove the following part(s) before trouble-
shooting:
1)Seat

Use the following special tool(s) for trouble-
shooting.
Pocket tester:
P/N. YU-03112, 90890-03112
EB802011
CONTINUITY 1.Fuse
Refer to “CHECKING THE SWITCH”.
NO CONTINUITY
Replace the fuse.
EB802012
CORRECT 2.Battery

Check...

8 - 21
–+ELECCHARGING SYSTEM
OUT OF
SPECIFICATION 

Start the engine and accelerate to about
5,000 r/min.
Charging voltage:
14 V at 5,000 r/minMEETS SPECIFICATION
The charging circuit is not faulty.
EB804012
MEETS
SPECIFICATION 4.Charging coil resistance

Disconnect the AC magneto coupler from
the wire harness.

Connect the pocket tester (Ω
 ×
 1) to the
charging coils.
Tester (+) lead → White terminal 1 
Tester (–) lead → White terminal 2 
Tester (+) lead → White terminal 1 
Tester (–) lead → White...

8 - 22
–+ELECLIGHTING SYSTEM
EB805000
LIGHTING SYSTEM
CIRCUIT DIAGRAM
3Main switch
4Battery
5Fuse
OLights switch
RHeadlight
STail/brake light 

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–+ELECLIGHTING SYSTEM
EB805010
TROUBLESHOOTING
Procedure
Check:
1.Fuse
2.Battery
3.Main switchIF THE HEADLIGHT AND/OR TAIL/BRAKE LIGHT FAIL TO COME ON:
4.Lights switch
5.Wiring connections 
(the entire lighting system)
OTE:

Remove the following part(s) before trouble-
shooting:
1)Seat
2)Front fender

Use the following special tool(s) for trouble-
shooting.
Pocket tester:
P/N. YU-03112, 90890-03112
EB802011
CONTINUITY 1.Fuse
Refer to “CHECKING THE SWITCH”.
NO CONTINUITY
Replace the fuse.
EB802012...

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–+ELECLIGHTING SYSTEM
C0NTINUITY
CORRECT 3.Main switch
Refer to “CHECKING THE SWITCH”.
*
INCORRECT 
Replace the main switch.
CORRECT 4.Lights switch
Refer to “CHECKING THE SWITCH”.
INCORRECT
Lights switch is faulty, replace the handlebar
switch (left).
EB805013
CORRECT 5.Wiring connection 

Check the connections of the entire lighting
system.
Refer to “WIRING DIAGRAM”.
Check the condition of each of the lighting
system’s circuits.
Refer to “CHECKING THE LIGHTING SYS-
TEM”.POOR CONNECTION
Properly...

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–+ELECLIGHTING SYSTEM
EB805020
CHECKING THE LIGHTING SYSTEM
1.If the headlights fail to come on:
CONTINUITY 1.Bulb and bulb socket

Check the bulb and bulb socket for continu-
ity.
NO CONTINUITY
Replace the bulb and/or bulb socket.
2.Voltage

Connect the pocket tester (DC 20V) to the
headlight couplers.
Tester (+) lead → 
Green terminal 1 or Yellow terminal 2 
Tester (–) lead → Black terminal 3 
È
When the lights switch is on “LO”.
ÉWhen the lights switch is on “HI”.
ÈÉ
MEETS
SPECIFICATION

Turn...

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–+ELECLIGHTING SYSTEM
EB805021
2.If the tail/brake light fails to come on:
CONTINUITY 1.Bulb and bulb socket

Check the bulb and bulb socket for continu-
ity.
NO CONTINUITY
Replace the bulb and/or bulb socket.
2.Voltage

Connect the pocket tester (20 V) to the bulb
socket coupler.
Tester (+) lead → Blue terminal 1 
Tester (–) lead → Black terminal 2 
MEETS
SPECIFICATION

Turn the main switch to “ON”.

Turn the lights switch to “LO” or “HI”.

Check the voltage (12 V) of the “Blue” lead
on the bulb...

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–+ELECSIGNAL SYSTEM
EB806000
SIGNAL SYSTEM
CIRCUIT DIAGRAM
3Main switch
4Battery
5Fuse
0CDI unit
CSpeed sensor
GCoolant temperature 
warning light
HReverse indicator light
INeutral indicator light
JNeutral switch
KReverse switch
LDiode
MThermo switch 2
PEngine stop switch
QStart switch
STail/brake light
TRear brake switch
UFront brake switch 

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–+ELECSIGNAL SYSTEM
EB806010
TROUBLESHOOTING
Procedure
Check:
1.Fuse
2.Battery
3.Main switch
4.Wiring connections 
(the entire signal system) IF THE TAIL/BRAKE LIGHT AND/OR INDICATOR LIGHT FAILS TO COME ON:
OTE:

Remove the following part(s) before trouble-
shooting:
1)Seat
2)Front fender
3)Rear fender

Use the following special tool(s) for trouble-
shooting.
Pocket tester:
P/N. YU-03112, 90890-03112
EB802011
CONTINUITY 1.Fuse
Refer to “CHECKING THE SWITCH”.
NO CONTINUITY
Replace the fuse....

8 - 29
–+ELECSIGNAL SYSTEM
C0NTINUITY
 
CORRECT 3.Main switch
Refer to “CHECKING THE SWITCH”.
*
INCORRECT 
Replace the main switch.
EB806011
CORRECT 4.Wiring connections

Check the connections of the entire signal
system.
Refer to “CIRCUIT DIAGRAM”.
Check the condition of each of the signal sys-
tem’s circuits. 
Refer to “CHECKING THE SIGNAL SYS-
TEM”.
POOR CONNECTION
Properly connect the signal system.