Troubleshooting; If The Pump Does Not Run; If The Pump Keeps Running And Does Not Stop - Winnebago 1987-1989 LeSharo Service Manual

FINAL DRIVE Oil COOLING SYSTEM
TROUBLESHOOTING
NOTE: Since this system is connected directly to the
battery through the alternator, testing may
be done with the ignition key in the OFF
position. Always disconnect the negative
terminal of the battery while replacing an
electrical component.
The following troubleshooting procedures
assume a final drive oil temperature of 50°F -
120°F.
If the Pump Does Not Run:
1. Disconnect the thermoswitch wires and touch
them together briefly.
2. If the motor runs, the thermoswitch may be
defective.
3. If the motor does not run, check the power
supply connections at the alternator for
corrosion or looseness.
4. If the alternator connections are OK, check the
circuit breaker by making a connection across
the terminals of the circuit breaker.
5. If the pump motor runs, the circuit breaker is
defective. If the motor still does not operate, the
pump motor itself may be faulty.
6. Double check the pump motor by attaching the
red wire to positive voltage and the blue wire to
ground. If the pump does not run, the pump
assembly should be replaced.
If the Pump Keeps Running and Does Not Stop:
1. Disconnect the thermoswitch contacts and wait
3 minutes for the timer-relay to shut the pump
off.
2. If the pump shuts off after 3 minutes, the
thermoswitch is defective.
3. If the pump continues to run after 3 minutes,
the timer-relay is defective.
F7-28
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