Yamaha XP500 Service Manual page 530

EAS00809
4. Radiator fan motor
• Disconnect the radiator fan motor coupler
from the wire harness.
• Connect the battery (DC 12 V) as shown.
Positive battery lead → blue 1
Negative battery lead → black 2
• Does the radiator fan motor turn?
YES
NO
The radiator fan
motor is faulty and
must be replaced.
COOLING SYSTEM
5. Radiator fan motor relay
• Remove the radiator fan motor relay from
the wire harness.
• Connect the pocket tester (Ω × 1) and bat-
tery (12 V) to the radiator fan motor relay
terminal as shown.
• Check the radiator fan motor relay of conti-
nuity.
Positive battery lead → yellow/red 1
Negative battery lead → red/white 2
Positive tester probe → brown/red 3
Negative tester probe → blue 4
• Does the radiator fan motor relay have
continuity between brown/red and blue?
8 - 52
ELEC
YES
Replace the radiator
fan motor relay.
– +
NO