Yamaha YJ50RAP Service Manual page 215

3. Fuel level gauge
• Set the main switch to "ON".
• Move the float up 1 or down 2.
• Check that the fuel level gauge needle
moves to "F" or "E".
NOTE:
Before reading the fuel level meter, leave
the float in one position (either up or down)
for at least three minutes.
1
2
• Does the fuel level gauge needle move
appropriately?
YES
NO
Replace the fuel
level gauge.
SIGNALING SYSTEM
4. Voltage
• Connect the pocket tester (DC 20 V) to the
fuel level gauge coupler (wire harness
side) as shown.
Fuel level gauge
Positive tester probe → brown 1
Negative tester probe → green 2
Fuel level indicator light
Positive tester probe → brown 1
Negative tester probe → black 3
• Set the main switch to "ON".
• Measure the voltage (12 V) of brown 1 on
the fuel level gauge coupler (wire harness
side).
• Is the voltage within specification?
This circuit is OK.
7 - 38
ELEC
YES
Check the
connections of the
entire signaling sys-
tem.
– +
NO
wiring