Yamaha XT660R S Service Manual page 428

4. Voltage
• Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness
end) as shown.
Positive tester probe → light green 1
Negative tester probe → ground
Ch R/G Y
Dg G/L R/W
G G/L R/W
Ch R/G Y
• Set the main switch to "ON".
• Shift the transmission to neutral.
• Measure the voltage (DC 12 V) of light
green 1 and ground at the meter assem-
bly coupler.
• Is the voltage within specification?
YES
This circuit is OK.
G/W Y/L
B/W Lg
1
B/W Lg
G/W Y/L
NO
The wiring circuit
from the main switch
to the meter assem-
bly couplers is faulty
and must be
repaired.
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SIGNALING SYSTEM
EAS00803
5. The fuel level warning light fails to come on.
1. Fuel level warning light LED
• Check the LED of the fuel level warning
light.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
• Is the fuel level warning light LED OK?
2. Fuel sender (thermistor)
• Disconnect the fuel sender coupler from
the fuel pump.
• Connect the pocket tester (kΩ × 1) to the
fuel sender as shown.
Positive tester probe → green/white 1
Negative tester probe → black 2
• Check the fuel sender for continuity.
• Is the fuel sender OK?
8 - 45
ELEC
YES
Replace the meter
assembly.
YES
Replace
pump assembly.
– +
NO
NO
the fuel