Re: EZGO TXTT with Good batteries, barely moves
The voltage between the B- and M- terminals on the controller ought to start at full battery pack voltage when the pedal is pushed just far enough to make the solenoid click and decrease to Zero Volts when pedal is on floor.
The only thing between those two terminals are the MOSFETs, which should be at 100% duty cycle with pedal on floor. Could be a bad throttle signal or a bad controller, but it might be something else depending on which type drive system (series or sepex)
Use the attached chart to identify drive type.
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