bulb YAMAHA YZF-R1S 2004 User Guide

8-7
CHECKING THE BULBS AND BULB SOCKETSELEC
NOTE:
NOTE:
WARNING
Pocket tester
90890-03112, YU-3112
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the re-
spective leads of the bulb socket.
c. Check the bulb socket for continuity. If any of
the readings indicate no continuity, replace
the bulb socket.
CHECKING THE LEDs
The following procedures applies to all of the
LEDs.
1. Check:

LED (for proper operation)
Improper operation
Replace.
a. Disconnect the meter assembly coupler (me-
ter assembly side).
b. Connect two jumper leads
1 from the bat-
tery terminals to the respective coupler ter-
minal.
As for connecting with which coupler terminal,
refer to “CABLE ROUTING” in chapter 2.

A wire that is used as a jumper lead must
have at least the same capacity of the bat-
tery lead, otherwise the jumper lead may
burn.

This check is likely to produce sparks,
therefore, make sure no flammable gas or
fluid is in the vicinity.
c. When the jumper leads are connected to the
terminals the respective LED should illumi-
nate.
Does not light
Replace the meter assem-
bly.
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8-31
High beam indicator light (LEDs)
Positive tester probe
black / yellow
Negative tester probe

black / white
YESNO 1. Headlight bulb and socket

Check the headlight bulb and socket for con-
tinuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

Are the headlight bulb and socket OK?
Replace the head-
light bulb, socket or
both.
YESNO 2. Voltage

Connect the pocket tester (DC 20 V) to the
headlight and meter assembly couplers as
shown.
The wiring circuit
from the main switch
to the headlight cou-
pler is faulty and
must be repaired.
When the dimmer switch is set to “ ”
When the dimmer switch is set to “ ”
Headlight coupler (wire harness side)
Low beam
Headlight
Positive tester probe
black
Negative tester probe
black / green
1
2
Meter assembly coupler (wire harness side)

Turn the main switch to “ON”.

Start the engine.

Set the dimmer switch to “ ” or “ ”.

Measure the voltage (DC 12 V) of
black / green or black / yellow on the
headlight coupler (wire harness side).

Is the voltage within specification?
2
This circuit is OK.
A
B
Headlight
Positive tester probe
black
Negative tester probe
black / yellow
A
Headlight coupler (wire harness side)
High beam
B
6
5
3
4
4
LIGHTING SYSTEMELEC
EAS00788
CHECKING THE LIGHTING SYSTEM
1. The headlight and the high beam indicator
light fail to come on.
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8-32
LIGHTING SYSTEMELEC
YESNO 1. License plate light bulb and socket

Check the license plate light bulb and socket
for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

Are the license plate light bulb and socket
OK?
Replace the license
plate light bulb, sock-
et or both.
EAS007922. The license plate light fails to come on.
YESNO 2. Voltage

Connect the pocket tester (DC 20 V) to the
license plate light coupler (wire harness light
side) as shown.
The wiring circuit
from the main switch
to the license plate
light coupler is faulty
and must be re-
paired. Positive tester probe
blue / red
Negative tester probe
black
1
2

Turn the main switch to “ON”.

Measure the voltage (DC 12 V) of blue / red
on the license plate light coupler (wire
harness side).

Is the voltage within specification?
1
This circuit is OK.
EAS00790
3. The tail / brake light fails to come on.
YESNO 1. Voltage

Connect the pocket tester (DC 20 V) to the
tail / brake light coupler (wire harness side)
as shown.
Wiring circuit from
the main switch to
the tail / brake light
coupler is faulty and
must be repaired. Positive tester probe
blue / red
Negative tester probe
black
1
2

Turn the main switch to “ON”.

Measure the voltage (DC 12 V) of blue / red
on the tail / brake light coupler (wire har-
ness side).

Is the voltage within specification?
1
This circuit is OK.
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8-33
LIGHTING SYSTEMELEC
EAS00791
4. The auxiliary light fails to come on.
YESNO 1. Auxiliary light and socket

Check the auxiliary light bulb and socket for
continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

Are the auxiliary light .bulb and socket OK?
Replace the auxiliary
light bulb, socket or
both.
YESNO 2. Voltage

Connect the pocket tester (DC 20 V) to the
auxiliary light coupler (auxiliary light side) as
shown.
The wiring circuit
from the main switch
to the auxiliary light
coupler is faulty and
must be repaired. Positive tester probe
blue / red
Negative tester probe
black
1

Turn the main switch to “ON”.

Measure the voltage (DC 12 V) of blue / red
on the auxiliary light coupler (auxiliary
light side).

Is the voltage within specification?
2
This circuit is OK.
2
5. The turn signa l/ position light fails to come on.
YESNO 1. Turn signal / position light and socket

Check the turn signal / position light bulb and
socket for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

Are the turn signal / position light bulb and
socket OK?
Replace the turn sig-
nal / position light
bulb, socket or both.
YESNO 2. Voltage

Connect the pocket tester (DC 20 V) to the
turn signal / position light coupler (wire har-
ness side) as shown.
The wiring circuit from
the main switch to the
turn signal / position
light coupler is faulty
and must be repaired.
Turn the main switch to “ON”.

Measure the voltage (DC 12 V) of blue or
blue on the turn signal / position light cou-
pler (wire harness side).

Is the voltage within specification?
3
This circuit is OK.
Left turn signal / position light
Positive tester probe
blue
Negative tester probe
black
Right turn signal / position light
Positive tester probe
blue
Negative tester probe
black
1
2
A
Left turn signal / position light
Right turn signal / position light
B
A
B
3
4
1
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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.
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8-42
SIGNALING SYSTEMELEC
YESNO 2. Voltage

Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness side)
as shown.
The wiring circuit
from the main switch
to the meter assem-
bly coupler is faulty
and must be re-
paired. Positive tester probe
green / white
Negative tester probe
black / white
1
2

Turn the main switch to “ON”.

Measure the voltage (DC 12 V) of
green / white and black / white at the
meter assembly coupler.

Is the voltage within specification?
This circuit is OK.
12
Replace the multi-
function meter.
NO
1. Multi-function meter bulb socket

Check the multi-function meter bulb socket
for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

Is the multi-function meter bulb socket OK?
YES
EAS008067. The speedometer fails to come on.
2. Speed sensor

Connect the pocket tester (DC 20 V) to the
speed sensor coupler (wire harness side)
as shown.
Replace the speed
sensor.
NOYES
Positive tester probe
white / yellow
Negative tester probe
black / blue1
2

Set the main switch to “ON”.

Elevate the rear wheel and slowly rotate it.

Measure the voltage (DC 5 V) of white / yel-
low and blue. With each full rotation of the
rear wheel, the voltage reading should cycle
from 0.6 V to 4.8 V to 0.6 V to 4.8 V.

Does the voltage reading cycle correctly?
This circuit is OK.
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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
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