Taylor-Dunn MB-238-00, Operation, T Roubleshooting And Replacement Parts Manual

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Electrical Troubleshooting
Troubleshooting Page 25
Pin# Condition Volts*
1
Key switch off 0.0 volts
Key switch on Battery volts
2
F&R in forward Low
F&R in neutral
High
F&R in reverse
3
F&R in reverse Low
F&R in neutral
High
F&R in forward
4
Accelerator pedal up High
Accelerator pedal down Low
5
Seat switch closed (depressed) Low
Seat switch open High
6
High/low switch in high Low
High/low Switch in low High
7
Hand brake switch closed Low
Hand brake switch open High
8
Key switch on (ref battery positive) **
Key switch off (ref battery positive) Battery volts
9
System off (ref battery positive) 0 volts
System on (ref battery positive) **
10
Accelerator pedal up 0.0-0.3 volts
Accelerator pedal down 4.8-5.0 volts
11 Not used -
12 Not used -
* - All voltages made referencing main negative unless specified otherwise
** - The voltage should start at approximately 24 volts, then drop to approximately 15 volts after
about 0.5 seconds.
Sevcon Logic Voltage Reference Table