Yamaha VMX12 2001 Service Manual page 434

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.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
• Are the fuel level indicator light bulb and
socket OK?
YES
2. Engine stop switch
• Check the engine stop switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the engine stop switch OK?
YES
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
NO
Replace the fuel level
indicator light bulb,
socket or both.
NO
Replace the right
handlebar switch.
SIGNALING SYSTEM
• Measure the fuel sender resistances.
Fuel sender resistance
(Ω × 100)
700 ~ 1,100 Ω at 25 °C
• Is the fuel sender OK?
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.
8 - 42
ELEC
YES
Replace
sender.
YES
The wiring
from the main switch
to the tachometer
coupler is faulty and
must be repaired.
– +
NO
the fuel
".
NO
circuit