Yamaha YFM400FAR Service Manual page 471

1.If the oil temperature warning light does not come on:
Check that the light comes on when the start switch is pushed on.
G
Check that the light comes on when the oil temperature is 145 °C (293 °F) or higher.
G
1.Bulb and bulb socket
Check the bulb and bulb socket for
continuity.
2.Voltage
Connect the pocket tester (DC 20 V) to the
G
bulb socket coupler (wire harness side).
Tester (+) lead → Red/Black terminal 1
Tester (–) lead → White/Blue terminal 2
Turn the start switch to "
G
switch to "ON".
Check the voltage (12 V).
G
3.Start switch
Refer to "CHECKING THE SWITCHES" in
CHAPTER 9. (Manual No.: 5TE-F8197-10)
*
CONTINUITY
" and the main
MEETS
SPECIFICATION
CORRECT
– 97 –
SIGNAL SYSTEM
NO CONTINUITY
Replace the bulb and/or bulb socket.
OUT OF SPECIFICATION
The wiring circuit from the main switch to the
bulb socket connector is faulty, repair it.
INCORRECT
Replace the handlebar switch (left).
– +
ELEC