Curtis PMC Troubleshooting
Page 9
1. Make sure the key-switch is in the “OFF” position, then remove the key.
2. Place the forward-reverse switch in the center “OFF” position.
3. Set the park brake.
4. Place blocks under the front wheels to prevent vehicle movement.
The rear drive wheels may rotate during some of the following tests. Block the
front wheels, raise the rear drive wheels off the ground, and support the vehicle
with jack stands. Failure to do so may cause the vehicle to move and cause
severe bodily injury and/or property damage.
Rotating rear drive wheels are a potential hazard. Keep hands, arms, legs and
loose clothing away from the rear drive wheels while conducting tests. Failure
to do so may cause serious bodily injury.
Motor shown for reference only. Terminal positions
on your motor may not be in the same location.
S2
A1
A2
S1
Wiring to motor omitted for clarity. Do not
disconnect the motor wires for this test.
Motor shown for reference only. Terminal positions
on your motor may not be in the same location.
S2
A1
A2
S1
Wiring to motor omitted for clarity. Do not
disconnect the motor wires for this test.
Motor
Set the test light voltage to the same voltage as the battery
volts.
Connect the test light across the motor ‘A1’ and ‘A2’
terminals.
Close all interlock switches, turn the Key Switch ON,
and place the F&R Switch in Forward.
Depress the accelerator fully.
•
If the light comes on then the motor armature
windings are open and the motor must be repaired
or replaced. Stop trouble shooting here and repair
the problem. When the repair is completed,
completely test the vehicle before lowering the drive
wheels to the ground.
Connect the test light across the motor ‘S1’ and ‘S2’ terminals.
Close all interlock switches, turn the Key Switch ON,
and place the F&R Switch in Forward.
Depress the accelerator fully.
•
If the light comes on then the motor field windings
are open and the motor must be repaired or replaced.
Stop trouble shooting here and repair the problem.
When the repair is completed, completely retest the
vehicle before lowering the drive wheels to the
ground.
•
If the test light did not come on during either test
then go to the
F/R Switch
sequence.
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