Yamaha YJ50RAP Service Manual page 214

4. Voltage
• Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness
side) as shown.
Positive tester probe → gray 1
Negative tester probe → black 2
Br
Y
• Set the main switch to "ON".
• Measure the voltage (12 V) of gray 1 and
black 2 at the meter assembly coupler.
• Is the voltage within specification?
YES
This circuit is OK.
EAS00803
6. The fuel level indicator light fails to come on.
1. Fuel level indicator light bulb and socket
• Check the fuel level indicator light bulb
and socket for continuity.
• Are the fuel level indicator light bulb and
socket OK?
YES
2
B
B Br
Br/W
Br/W Y
Gy Gy
1
NO
The wiring circuit
from the main
switch to the meter
light coupler
faulty and must be
repaired.
NO
Replace the fuel
level indicator light
bulb, socket or both.
SIGNALING SYSTEM
EAS00804
2. Fuel sender
• Remove the fuel sender from the fuel tank.
• Connect the pocket tester to the fuel
sender coupler (fuel sender side) as
shown.
Positive tester probe → green 1
Negative tester probe → black 2
Fuel sender resistance (up position)
(Ω × 1)
4 ~ 10 Ω at 20 °C (68 °F)
Fuel sender resistance (down position)
(Ω × 10)
90 ~ 100 Ω at 20 °C (68 °F)
• Is the fuel sender OK?
is
7 - 37
ELEC
2 1
B G
YES
Replace
sender.
– +
È
É
NO
the fuel