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



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Old 12-10-2013, 08:01 AM   #1
e-z-go1988
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Default 1204 controller, half-speed forward full speed reverse

New 1991 ezgo with 1204 controller has issues. What can be done to reverse this condition without swapping wires on the F/R or S1 and S2 on the motor?
This controller does not have the 4th wire (orange) to unplug as the 1205 does. Another thread mentions swapping the 2 wires on the F/R but that the handle position is reversed.
Thank you.
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Old 12-10-2013, 09:45 AM   #2
scottyb
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Default Re: 1204 controller, half-speed forward full speed reverse

Swap the leads at the motor end....
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Old 12-10-2013, 10:52 AM   #3
e-z-go1988
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Default Re: 1204 controller, half-speed forward full speed reverse

I was hoping that might work but wanted confirmation from an expert first.
Thank you for the response.
Dennis
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Old 12-10-2013, 12:26 PM   #4
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Default Re: 1204 controller, half-speed forward full speed reverse

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Originally Posted by scottyb View Post
Swap the leads at the motor end....
Swapped the leads S1 and S2 at the motor but handle positions are reversed as I suspected they would be. Also the buzzer is annoying!
Thank you or your input anyway.
What actually controls the 1/2 speed reverse mode on the 1204? Would reversing the 2-pin connector on the controller have any affect?
Dennis
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Old 12-10-2013, 12:58 PM   #5
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Default Re: 1204 controller, half-speed forward full speed reverse

Quote:
Originally Posted by e-z-go1988 View Post
Swapped the leads S1 and S2 at the motor but handle positions are reversed as I suspected they would be. Also the buzzer is annoying!
Thank you or your input anyway.
What actually controls the 1/2 speed reverse mode on the 1204? Would reversing the 2-pin connector on the controller have any affect?
Dennis
Leave the S1&S2 switched and now switch the A1&A2 leads. That should get the F/R switch and motor direction back in sync.

If your Marathon has a pot-box type throttle, disconnect the two wires between the pot-box and the F/R assembly to get rid of the 1/2 speed.

What happens is that a microswitch on the F/R places a 5K fixed resistor in parallel with the 0-5K pot, so the controller only sees 0-2.5K rather than the normal 0-5K.
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Old 12-10-2013, 02:47 PM   #6
e-z-go1988
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Default Re: 1204 controller, half-speed forward full speed reverse

Quote:
Originally Posted by JohnnieB View Post
Leave the S1&S2 switched and now switch the A1&A2 leads. That should get the F/R switch and motor direction back in sync.

If your Marathon has a pot-box type throttle, disconnect the two wires

What happens is that a microswitch on the F/R places a 5K fixed resistor in parallel with the 0-5K pot, so the controller only sees 0-2.5K rather than the normal 0-5K.

Thank you for the explanation regarding the pot box. Just what I wanted!
I did return the S1 and S2 to their original positions so I will leave the A1 and A2 alone. I will disconnect the 2 wires between the pot-box and the F/R assembly to get rid of the 1/2 reverse speed to simplify matters. Evidently the micro is defective?
I'm really not interested in 1/2 speed!
Thanks again for the explanation,
Dennis
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Old 12-11-2013, 09:27 AM   #7
e-z-go1988
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Default Re: 1204 controller, half-speed forward full speed reverse

After all that, the micro is ok, I reconnected it and 1/2 speed reverse, removed it and full speed reverse just as it was explained by JB. Don't know what the real problem was but it was way torquey/speedy in reverse, and now it is working as it should! May be an intermittent problem.
Thank you
Dennis
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