Taylor-Dunn ET-015-00, Operation, T Roubleshooting And Replacement Parts Manual

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Maintenance, Service, and Repair
Electrical Troubleshooting
Page 3
READ THIS FIRST
Test Equipment Required:
•
Digital multimeter (DMM) with diode test function,
•
Shunt or clamp-on DC Ammeter to measure up to 400 amps.
•
Test light with a rated voltage equal to or exceeds maximum battery voltage.
•
Test harness, Taylor-Dunn part number 75-089-00.
IMPORTANT NOTES and INSTRUCTIONS
•
This troubleshooting guide assumes that the vehicle is wired correctly. It is not intended
to diagnose a vehicle that is not wired correctly.
•
This troubleshooting guide is not written to be able to locate a problem if there are multiple
component failures.
•
This troubleshooting guide assumes the batteries are good. Fully charge and test the
batteries before troubleshooting the control system.
•
All voltage tests are referenced to battery negative unless otherwise specified. This vehicle
does not have a frame ground.
•
DO NOT start in the middle of this troubleshooting guide. Start at the beginning and
complete each test in the order that they are written. Do not skip any test unless instructed
to do so. Once a problem is found, stop testing and repair the indicated problem. When
the repair is completed it is recommended that the control system be retested before
lowering the drive wheels to the ground.
•
This troubleshooting guide requires the use of a test light rated at the battery voltage of
the truck and the Taylor-Dunn Accelerator Module Test Harness. Troubleshooting CANNOT
be completed without these tools. If, during any test involving a test light where the light is
OFF when it should be ON, confirm the test light is good before continuing
These test procedures must be performed in the order they were
written. If the test result is good, then proceed to the next test or
go to the next section. Failure to do so may result in incorrect test
results.
These test procedures must be performed in the order they were
written. If the test result is good, then proceed to the next test or
go to the next section. Failure to do so may result in incorrect test
results.