Yamaha VMX12 2001, Service Manual

Page: 434 / 454

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ELEC
SIGNALING SYSTEM
EAS00803
6. The fuel level indicator light fails to come
on.
YES
NO
YES
NO
YES NO
YES NO
1. Fuel level indicator light bulb and socket
• Check the fuel level indicator light bulb and
socket for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
• Are the fuel level indicator light bulb and
socket OK?
Replace the fuel level
indicator light bulb,
socket or both.
2. Engine stop switch
• Check the engine stop switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the engine stop switch OK?
Replace the right
handlebar switch.
3. Fuel sender
• Drain the fuel from the fuel tank and remove
the fuel sender from the fuel tank.
• Disconnect the fuel sender coupler from the
wire harness.
• Connect the pocket tester (
Ω ×
1) to the fuel
sender coupler as shown.
Positive tester probe
→
green
1
Negative tester probe
→
black
2
• Measure the fuel sender resistances.
Fuel sender resistance
(
Ω ×
100)
700 ~ 1,100
Ω
at 25 °C
• Is the fuel sender OK?
Replace the fuel
sender.
4. Voltage
• Connect the pocket tester (DC 20 V) to the
tachometer coupler (wire harness side) as
shown.
Positive tester probe
→
red/black
1
Negative tester probe
→
ground
• Set the main switch to “ON”.
• Set the engine stop switch to “
”.
• Measure the voltage (12 V) of red/black
1
at the tachometer coupler.
• Is the voltage within specification?
This circuit is OK. The wiring circuit
from the main switch
to the tachometer
coupler is faulty and
must be repaired.