Taylor-Dunn B0-T48-48 Taylor Truck T48, Operation, T Roubleshooting And Replacement Parts Manual

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Sevcon Troubleshooting
Page 12
Electrical Troubleshooting
Test 6. ACCELERATOR MODULE FAULT
With the power switch OFF, connect the throttle
module to the analyzer.
Position the power switch to the 0-5 volt range.
All but the power lamp should be OFF. If the
FS-1, FS-3 or OV lamp (Over Voltage) are ON,
then the module is faulty.
Depress the lever on the module. The FS-1
lamp should be ON with no more that a few
degrees of rotation. If the FS-1 lamp does not
come on, then the module is faulty (see note
below).
The voltage on the digital display should vary
with the position of the module arm, starting at
0-volts and ending at approximately 5-volts.
If the OV lamp comes ON at any time, then the
module is faulty.
If the Low battery lamp is ON, then the analyzer
battery should be replaced.
Additional information regarding the analyzer
can be found in the instructions provided with
the analyzer (D0-110-53)
Disconnect both of the battery leads during any maintenance or
before disconnecting any electrical component or wire. Failure to do
so may cause property damage and/or serious bodily injury.
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.
NOTE: Failures of the FS-1 circuit indicate a possible vehicle wiring fault that has
resulted in a short circuit across FS-1. BEFORE REPLACING THE
MODULE: Confirm that there are no shorts in the vehicle wiring or
components. Installing a replacement module in a vehicle with faulty wiring
will burn out the new module.