Yamaha T135SE Service Manual page 334

4. Radiator fan motor
9Disconnect the radiator fan motor coupler
from the wireharness.
9Connect the battery (12 V) as shown.
Battery positive lead → → blue 1 1
Battery negative lead → → black 2 2
2
L
B
1
9Does the radiator fan motor turn?
YES
YamahaT135.COM
Yamaha T135 Service Manual
NO
The radiator fan
motor is faulty and
must be replaced.
COOLING SYSTEM
5. Radiator fan motor relay
9Disconnect the radiator fan motor relay cou-
pler.
9Connect the pocket tester to the radiator fan
motor relay coupler (relay side) as shown.
Battery positive lead → → brown 1 1
Battery negative lead → → white/yellow 2 2
Positive tester probe → → brown 3 3
Negative tester probe → → blue 4 4
4
L
W /Y
Br Br
3
9Check the radiator fan motor relay blue and
brown for continuity.
9Does the coupler is OK?
YES
8-42
ELEC
2
L /Y
W
Br Br
1
NO
Replace the radiator
fan motor relay.