Yamaha 2001 YJ50RAP, Service Manual

Page: 210 / 228

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– +
ELEC
YES
NO
EAS00798
2. The tail/brake light fails to come on.
YES
NO
YES NO
YES
NO
4. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the pink terminal as
shown.
Positive tester probe
→
pink
1
Negative tester probe
→
ground
• Set the main switch to “ON”.
• Measure the voltage (12 V) of pink
1
at
the horn terminal.
• Is the voltage within specification?
Repair or replace
the horn. Replace the horn.
1. Tail/brake light bulb and socket
• Check the tail/brake light bulb and socket
for continuity.
• Are the tail/brake light bulb and socket
OK?
Replace the tail/
brake light bulb,
socket or both.
2. Brake light switches
• Check the brake light switches for continu-
ity.
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
→
green/yellow
1
Negative tester probe
→
black
2
• Set the main switch to “ON”.
• Pull in the brake levers.
• Measure the voltage (12 V) of green/yel-
low
1
on the tail/brake light coupler (wire
harness side).
• Is the voltage within specification?
This circuit is OK. The wiring circuit
from the main
switch to the tail/
brake light coupler
is faulty and must
be repaired.
L
Y
B G/Y
B
L
1
2
SIGNALING SYSTEM
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