Troubleshooting - Yamaha XVZ13TF 1999 Service Manual

EAS00808

TROUBLESHOOTING

S The radiator fan motor fails to turn.
S The engine overheat indicator light fails
to come on when the engine is hot.
Check:
1. Main, turn signal, and rediator fan motor
fuses
2. Battery
3. Main switch
4. Radiator fan motor
5. Thermo switch
6. Thermo unit
7. Water temperature warning light bulb and
socket
8. Wiring connections
(the entire cooling system)
NOTE:
S Before troubleshooting, remove the following
part(-s).
1) Rider and passenger seats
2) Side covers (left and right)
3) Fuel tank
S Troubleshoot with the following special
tool(-s).
Pocket tester
YU-03112, 90890-03112
EAS00738
1. Main, signal, and radiator fan motor fuses
S Check the main, signal, and radiator fan mo-
tor fuses for continuity.
Refert to "CHECKING THE FUSES" in
CHAPTER 3.
S Are the main, turn signal, and radiator fan
motor fuses OK?
YES
EAS00739
2. Battery
S Check the condition of the battery.
Refer to "CHECKING THE BATTERY" in
CHAPTER 3.
Open-circuit voltage
12.8 V or more at 20_C
NO
Replace the fuse (-s).
COOLING SYSTEM
S Is the battery OK?
YES
EAS00749
3. Main switch
S Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the main switch OK?
YES
EAS00809
4. Radiator fan motor
S Disconnect the rediator fan motor coupler
(wire harness side).
S Connect the battery (12 V) as shown.
Battery positive lead ! blue
Battery negative lead ! black
S Does the rediator fan motor turn?
YES
8-40
ELEC
NO
S Clean the battery
terminals.
S Recharge
or re-
place the battery.
NO
Replace the main
switch.
1
2
NO
The radiator fan mo-
tor is faulty and must
be replaced.