Taylor-Dunn SC-011-59 Operation, T Roubleshooting And Replacement Parts Manual page 117

Set the test light voltage to the same voltage as
the battery volts.
Connect the test light across the Normally Closed
contacts of the Reverse solenoid. Refer to your
vehicles wiring diagram to identify the position
of the Reverse solenoid.
Close all interlock switches, turn the Key
Switch ON, and place the F&R Switch in
Forward.
Depress the accelerator pedal fully.
•
If the light comes on then the Reverse
solenoid 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.
Stop, do not continue. If you reached this point without a solution, then you may have an
unanticipated problem or have made an error during testing. It is important to review the
trouble shooting steps that have led to this point. The tests may need to be repeated.
Electrical Troubleshooting
STOP
Main Sequence Page 21
FWD/REV
Solenoids are shown for reference only.
The type and position of the reverse
solenoid in your truck may be different