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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



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Old 04-16-2018, 10:10 AM   #1
george lai
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Default RXV Brake testing

My carts motor brake is stuck. Thank you for reading in advance. I have 50 volts at the brake , Also the coil of the brake checks out at 25.5 ohms. I tested the voltage in tow mode. The only thing I can tell you is , while pushing on the cart simultaneously switching to tow mode the brake releases for a second. I hear two clickes while doing this procedure.
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Old 12-14-2018, 10:20 PM   #2
The Big Guy
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Default Re: RXV Brake testing

Did you ever get a resolution to this? I am having similar symptoms.

50 at brake when emergency tow mode is engaged (through auxiliary power line), otherwise no voltage at brake.

When I switch to normal tow mode (with primary power line hooked up) I can push it for a second, then brake clamps down again.

Would love to know what was final verdict for you.
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Old 12-15-2018, 12:40 AM   #3
cgtech
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Default Re: RXV Brake testing

Likely motor encoder problems for that one. Probably bad encoder, or acid corrosion in the wire harness.
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Old 12-15-2018, 03:04 PM   #4
The Big Guy
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Default Re: RXV Brake testing

I am hoping for a brake pedal harness problem. I ran the Brake Pedal Test on page 42 of the trouble shooting guide. I couldn't really see across which wires they were measuring the impedance (looks mostly like red and red, but that seems counter intuitive to me). So I ran it across all of them.

Cart in TOW mode (normal tow mode with switch, not emergency tow mode switching power line harnesses)
Ignition in Neutral
Positive in Left Red, Negative probe in other red: 2X Ohms (pulsing)
Positive in Left Red, Negative probe in middle black: OL
Positive in Left Red, Negative probe in right hand black: OL

All read OL after pushing the brake pedal past 90%.

I think I am supposed to have the 0-0.1 impedance from red to black before I hit brake pedal, is that correct?
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