Taylor-Dunn SC-011-59 Operation, T Roubleshooting And Replacement Parts Manual page 113

Connect a voltmeter across the reverse terminal
of the forward and reverse side of the F&R switch
and battery negative.
Close all interlock switches, turn the Key
Switch ON, and place the F&R Switch in
reverse.
Depress the accelerator pedal fully.
•
If the voltage is not at battery volts then
the F&R switch 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.
•
If all tests in this section were good then
check the wiring from the F&R switch to
the Forward and Reverse solenoids and both the forward and reverse solenoid coils.
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.
Solenoids
If the vehicle runs in forward only then skip ahead to the test sequence Forward (does not
run in reverse).
If the vehicle runs in reverse only then skip ahead to the test sequence Reverse (does not
run in forward).
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
Electrical Troubleshooting
The REVERSE terminal is diagonally
opposite the reverse side of the
rocker on the switch
FLUKE 79 SERIES II MULTIMETER
OFF
V
Hz
V
mV
A
F&R switch seen
Battery Negative
from the rear
Page 17
F&R switch seen from
the side depressed in
the REVERSE gear