Yamaha 2012 Grizzly 300 Service Manual page 87

CHECK THE COOLANT TEMPERATURE INDICATOR LIGHT
Coolant temperature indicator
light does not come on.
Push start switch with
transmission in "neutral".
Coolant temperature
indicator light comes
on momentarily.
Coolant temperature
and electrical circuit are
OK. Go ahead with riding.
Coolant temperature indicator light checking method
Turn the main switch "ON" and
the engine stop switch to "
Coolant temperature indicator
light does not come on.
Ask a Yamaha dealer to
inspect the electrical circuit.
3-29
CHK
ADJ
".
Coolant temperature indicator
light comes on.