Yamaha YFM660RN Service Manual page 319

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4.Fan motor
Disconnect the fan motor coupler.
Connect the battery (12 V) as shown.
Battery (+) lead → Blue terminal 1
Battery (–) lead → Black terminal 2
Check the operation of the fan motor.
5.Circuit breaker (fan motor)
Remove the circuit breaker from the wire
harness.
Connect the pocket tester (Ω × 1) to the cir-
cuit breaker.
Circuit breaker resistance:
Zero Ω at 20 °C (68 °F)
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C0NTINUITY
TURNS
MEETS
SPECIFICATION
8 - 38
COOLING SYSTEM
DOES NOT TURN
Replace the fan motor.
OUT OF SPECIFICATION
Replace the circuit breaker.
– +
ELEC