Taylor-Dunn SC-011-59 Operation, T Roubleshooting And Replacement Parts Manual page 104

Electrical Troubleshooting
Power Wire Inputs
Connect a voltmeter to the PMC 'B-' terminal
and battery positive.
• If the voltage is not the same as battery
volts then there is an open circuit in the
wire from 'B-' to the battery. Stop
troubleshooting here and repair the
problem. When the repair is completed,
completely retest the vehicle before
lowering the drive wheels to the ground.
Connect a voltmeter across the PMC 'B-'
terminal and the PMC 'B+' terminal.
Close all interlock switches, turn the Key
Switch ON, and place the F&R Switch in
Forward.
Depress the accelerator pedal to engage
MS-1 only.
•
If the voltage is not the same as battery
volts then go to the Solenoids sequence.
•
If the voltage is the same as battery volts
then the PMC controller has failed. 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.
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.
Main Sequence
The voltage shown is for illustration
only. The actual voltage may vary.
+
_
Main Battery Positive
The voltage shown is for illustration
only. The actual voltage may vary.
+
_
Page 8
B- B+
KSI
#2
M-
A2
B- B+
KSI
#2
M-
A2