Page 430 of 457
8-37
SIGNALING SYSTEMELEC
YESNO 1. Tail / brake light bulb and socket
Check the tail / brake light bulb and socket for
continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
Are the tail / brake light bulb and socket OK?
Replace the tail /
brake light bulb,
socket or both.
EAS007972. The tail / brake light fails to come on.
YESNO 2. Brake light switches
Check the brake light switches for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the brake light switch OK?
Replace the brake
light switch.
3. Voltage
Connect the pocket tester (DC 20 V) to the
tail / brake light coupler (wire harness side)
as shown.
Positive tester probe yellow
Negative tester probe black
1
2
Turn the main switch to “ON”.
Pull in the brake lever or push down on the
brake pedal.
Measure the voltage (DC 12 V) of yellow
on the tail / brake light coupler (wire harness
side).
Is the voltage within specification?
1
YESNO 2. Voltage
Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
The wiring circuit
from the main switch
to the horn connec-
tor is faulty and must
be repaired. Positive tester probe black / white
Negative tester probe ground
1
Turn the main switch to “ON”.
Push the horn switch.
Measure the voltage (DC 12 V) of
black / white at the horn terminal.
Is the voltage within specification?
NOYES 3. Horn
Disconnect the black connector at the horn
terminal.
Connect a jumper lead to the horn termi-
nal and ground the jumper lead.
Turn the main switch to “ON”.
Push the horn switch.
Does the horn sound?
The horn is OK.
1
Replace the horn.
ProCarManuals.com
Page 454 of 457
9-6
FAULTY LIGHTING OR SIGNALING SYSTEM
TRBL
SHTG
TURN SIGNAL DOES NOT COME ON
Faulty turn signal switch
Faulty turn signal relay
Burnt-out turn signal bulb
Incorrect connection
Damaged or faulty wire harness
Improperly grounded circuit
Faulty battery
Blown, damaged or incorrect fuse
TURN SIGNAL BLINKS SLOWLY
Faulty turn signal relay
Faulty main switch
Faulty turn signal switch
Incorrect turn signal bulb
TURN SIGNAL REMAINS LIT
Faulty turn signal relay
Burnt-out turn signal bulb
TURN SIGNAL BLINKS QUICKLY
Incorrect turn signal bulb
Faulty turn signal relay
Burnt-out turn signal bulb
HORN DOES NOT SOUND
Improperly adjusted horn
Damaged or faulty horn
Faulty main switch
Faulty horn switch
Faulty battery
Blown, damaged or incorrect fuse
Faulty wire harness
EAS00866
FAULTY LIGHTING OR SIGNALING SYSTEM
HEADLIGHT DOES NOT COME ON
Wrong headlight bulb
Too many electrical accessories
Hard charging
Incorrect connection
Improperly grounded circuit
Poor contacts (main or light switch)
Burnt-out headlight bulb
HEADLIGHT BULB BURNT OUT
Wrong headlight bulb
Faulty battery
Faulty rectifier / regulator
Improperly grounded circuit
Faulty main switch
Faulty light switch
Headlight bulb life expired
TAIL / BRAKE LIGHT DOES NOT COME ON
Too many electrical accessories
Incorrect connection
TAIL / BRAKE LIGHT BULB BURNT OUT
Faulty battery
Incorrectly adjusted rear brake light switch
ProCarManuals.com
Page 455 of 457
59Clutch switch
60Turn signal switch
61Horn
62Front turn signal / position light (left)
63Front turn signal / position light (right)
64Rear turn signal light (left)
65Rear turn signal light (right)
66Headlight
67Auxiliary light
68License plate light
69Rear brake light switch
70Tail / brake light
71Headlight relay (on / off)
72Headlight relay (dimmer)
73Fuse (ignition)
74Fuse (signal)
75Fuse (headlight)
76Radiator fan motor relay
77Fuse (radiator fan motor left)
78Fuse (radiator fan motor light)
79Radiator fan motor 2
80Radiator fan motor 1
81Ground
COLOR CODE
B Black. . . . .
Br Brown. . . .
Ch Chocolate. . .
Dg Dark green. . .
G Green. . . .
Gy Gray. . .
L Blue. . . . .
Lg Light green. . . .
O Orange. . . .
P Pink. . . . .
R Red. . . . .
Sb Sky blue. . . .
W White. . . .
Y Yellow. . . . .
B / G Black / Green. .
B / L Black / Blue. . .
B / R Black / Red. .
B / W Black / White. .
B / Y Black / Yellow. .
Br / G Brown / Green.
Br / L Brown / Blue. .
Br / R Brown / Red. .
Br / W Brown / White.
G / B Green / Black. .
G / R Green / Red. .
G / W Green / White. . G / Y Green / Yellow. .
Gy / B Gray / Black.
Gy / G Gray / Green.
Gy / R Gray / Red.
L / B Blue / Black. . .
L / R Blue / Red. .
L / W Blue / White. .
L / Y Blue / Yellow. . .
O / B Orange / Black. .
O / G Orange / Green. .
P / W Pink / White. .
R / B Red / Black. .
R / G Red / Green. .
R / L Red / Blue. .
R / W Red / White. .
R / Y Red / Yellow. .
Sb / W Sky blue / White.
W / B White / Black. .
W / R White / Red. .
W / Y White / Yellow. .
Y / B Yellow / Black. .
Y / G Yellow / Green. .
Y / L Yellow / Blue. . .
Y / R Yellow / Red. .
Y / W Yellow / White. .
YZF-R1S / YZF-R1SC WIRING DIAGRAM
1Main switch
2A.C. magneto
3Rectifier / regulator
4Fuse (main)
5Fuse (backup)
6Battery
7Fuse (fuel injection)
8Starter relay
9Starter motor
10Starting circuit cut-off relay
11Neutral switch
12Sidestand switch
13Fuel pump
14E.C.U
15Ignition coil #1
16Ignition coil #2
17Ignition coil #3
18Ignition coil #4
19Spark plug
20Injector #1
21Injector #2
22Injector #3
23Injector #4
24Air induction system solenoid
25Sub-throttle position sensor
26EXUP servo motor
27Speed sensor
28Coolant temperature sensor
29Intake air temperature sensor
30Option switch
31Crankshaft position sensor
32Throttle position sensor
33Intake air pressure sensor
34Atmospheric pressure sensor
35Cylinder identification sensor
36Lean angle cut-off switch
37Meter assembly
38Fuel level warning light
39Oil level warning light
40Neutral indicator light
41Tacho meter
42Shift timing indicator light
43Multi function meter
44Engine trouble warning light
45Coolant temperature indicator light
46Hi beam indicator light
47Turn signal indicator light (left)
48Turn signal indicator light (light)
49Meter light
50Oil level switch
51Right handlebar switch
52Front brake light switch
53Engine stop switch
54Start switch
55Turn signal relay
56Left handlebar switch
57Dimmer switch
58Horn switch
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