1997 Yamaha YFM600FWAK ATV Service Manual, Page 301Get this manual
SIGNAL SYSTEM Turn the main switch to "ON" Check for voltage (12 V)
IELEC I0 I
OUT OF SPECIFICATION
MEETS SPECIFICATION
This circuit is not faulty
The wiring circuit from the main switch to the bulb socket connector is faulty, repair it
3.0il temp warning light does not come on when the start switch is pushed on, or oil temp warning light does not come on when temperature is high (more than 147.5162.5C (297.5324.5F))
1.Bulb and bulb socket Check the bulb and bulb socket for continuityCONTINUITY 2.Thermo unit Remove the thermo unit from the crankcase Connect the pocket tester (0 10) to the thermo unit CD Immerse the thermo unit in the engine oilev Measure the resistanceThermo unit resistance: 150C (302 OF): 307 339 220C (428 OF): 209 231 0