Yamaha Fz1n Service Manual

LIGHTING SYSTEM
8-17
ET2D1026
CIRCUIT DIAGRAM (FZ1-S) 

LIGHTING SYSTEM
8-18
1. Main switch
6. Fuse (main)
7. Battery
23.ECU
49.High beam indicator light
52.Meter light
61.Pass switch
62.Dimmer switch
72.Auxiliary light
73.Headlight
74.License plate light
75.Tail/brake light
76.Headlight relay (on/off)
77.Headlight relay (dimmer)
78.Fuse (tail light)
82.Fuse (headlight) 

LIGHTING SYSTEM
8-19
EAS27260
TROUBLESHOOTING
Any of the following fail to light: headlight, high beam indicator light, taillight, license light or meter 
light.
NOTE:
 Before troubleshooting, remove the following part(s):
1 Rider and passenger seat
2 Fuel tank
3 Air filter caseNG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
1 Check the each bulbs and bulb 
sockets condition.
Refer to CHECKING THE BULBS 
AND BULB SOCKETS on page 8-
96. Replace the bulb(s) and bulb 
socket(s).
2 Check the...

LIGHTING SYSTEM
8-20
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
8 Check the headlight relay (on/off).
Refer to CHECKING THE 
RELAYS on page 8-100. Replace the headlight relay.
9 Check the headlight relay (dimmer)  (FZ1-S).
Refer to CHECKING THE 
RELAYS on page 8-100. Replace the headlight relay.
10 Check the entire lighting system’s  wiring.
Refer to CIRCUIT DIAGRAM 
(FZ1-N) on page 8-15. Properly connect or repair the lighting 
system’s wiring.
This circuit is OK. 

SIGNALING SYSTEM
8-21
EAS27270
SIGNALING SYSTEM
EAS27280
CIRCUIT DIAGRAM 

SIGNALING SYSTEM
8-22
1. Main switch
6. Fuse (main)
7. Battery
11.Relay unit
14.Neutral switch
16.Fuel pump
19.Speed sensor
23.ECU
42.Fuel level warning light
43.Oil level warning light
44.Neutral indicator light
45.Tacho meter
46.Multi function meter
48.Coolant temperature indicator light
50.Turn signal indicator light (left)
51.Turn signal indicator light (right)
53.Oil level switch
55.Front brake light switch
58.Rear brake light switch
63.Hazard switch
64.Turn signal switch
65.Horn switch
66.Horn...

SIGNALING SYSTEM
8-23
EAS27290
TROUBLESHOOTING
 Any of the following fail to light: turn signal light, brake light or an indicator light.
 The horn fails to sound.
NOTE:
 Before troubleshooting, remove the following part(s):
1 Rider and passenger seat
2 Fuel tank
3 Air filter caseNG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
Check the signaling system
The horn fails to sound. NG→
OK ↓
NG→
OK ↓
1 Check the fuses.
(Main, ignition, signal and tail/brake 
light)
Refer to CHECKING THE FUSES 
on page 8-97. Replace...

SIGNALING SYSTEM
8-24
NG→
OK ↓
The tail/brake light fails to come on. NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
The turn signal light, turn signal indicator light or both fail to blink. NG→
OK ↓
NG→
OK ↓
3 Check the entire signaling system’s 
wiring.
Refer to CIRCUIT DIAGRAM on 
page 8-21. Properly connect or repair the signal-
ing system wiring.
This circuit is OK.
1 Check the tail/brake light bulb and  socket.
Refer to CHECKING THE BULBS 
AND BULB SOCKETS on page 8-
96. Replace the tail/brake light bulb,...

SIGNALING SYSTEM
8-25
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
The neutral indicator light fails to come on. NG→
OK ↓
NG→
OK ↓
The oil level warning light fails to come on. NG→
OK ↓
NG→
OK ↓
The fuel level warning light fails to come on. 3 Check the hazard switch.
Refer to CHECKING THE 
SWITCHES on page 8-93. Replace the left handlebar switch.
4 Check the turn signal/hazard relay. Refer to CHECKING THE 
RELAYS on page 8-100. Replace the turn signal/hazard relay.
5 Check the entire signaling system’s  wiring.
Refer to...

SIGNALING SYSTEM
8-26
NG→
OK ↓
NG→
OK ↓
The speedometer fails to operate. NG→
OK ↓
NG→
OK ↓
1 Check the fuel sender.
Refer to CHECKING THE FUEL 
SENDER on page 8-107. Replace the fuel pump assembly.
2 Check the entire signaling system’s  wiring.
Refer to CIRCUIT DIAGRAM on 
page 8-21. Properly connect or repair the signal-
ing system’s wiring.
This circuit is OK.
1 Check the speed sensor. Refer to CHECKING THE SPEED 
SENSOR on page 8-107. Replace the speed sensor.
2 Check the entire signaling system’s...