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Yamaha YZF-R1 1998 Service Manual Page 385

Yzf-r1 1998.
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Table of Contents
EB806411
2. A tail/brake light fails to come on.
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?
YES
2.Brake light switches
• Check the brake light switches for conti-
nuity.
Refer to "CHECKING THE SWITCHES".
• Is the brake light switch OK?
YES
3.Voltage
• Connect the pocket tester (DC 20V) to
the tail/brake light coupler (wire harness
side) as shown.
Tester positive probe → yellow 1
Tester negative probe → black 2
NO
Replace
the
tail/
brake
light
bulb,
socket or both.
NO
Replace the brake
light switch.
SIGNALING SYSTEM
• Set the main switch to "ON".
• Pull in the brake lever or push down on
the brake pedal.
• Measure the voltage (12 V) of yellow at
the tail/brake light coupler (wire harness
side).
• Is the voltage within specification?
This circuit is OK.
EB806413
3. A turn signal light, turn signal indicator
light or both fail to blink.
1.Turn signal light bulb and socket
• Check the turn signal light bulb and
socket for continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
• Are the turn signal light bulb and socket
OK?
2.Turn signal indicator light LED
• Check the LED of the turn signal indica-
tor light.
Refer to "CHECKING THE LEDs".
• Is the turn signal indicator light LED OK?
8 - 39
ELEC
YES
The wiring circuit
from
the
switch to the tail/
brake light coupler
is faulty and must
be repaired.
YES
Replace
signal
light
socket or both.
YES
Replace the meter
assembly.
+
NO
main
NO
the
turn
bulb,
NO

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