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



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Unread 08-10-2016, 07:58 PM   #1
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Default 94 Medalist intermittent shutdown

My 94 medalist that has been converted to 48v for about 4 yrs. with an Alltrax AXE4855, 400a solenoid, h/d f/r switch, 2ga cables, has been quitting onme lately. When it quits the solenoid does not drop out until I let off the throttle, the controller has a green light, throttle signal starts at 9.4v and decreases to 5.4v, pack voltage at controller but nothing on M-. When it runs everything checks out according to the troubleshooting guides. I'm pretty sure the controller is junk but I wanted to ask if anyone has ideas on other things to check before I throw more money at a new controller.
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Unread 08-10-2016, 08:18 PM   #2
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Default Re: 94 Medalist intermittent shutdown

Sounds like the controller is failed. pqck voltage on pin 1 and 10v - 6 v (+/- .5v) at pins 2&3... You should have full pack voltage between M- and B- when the solenoids clicks (trying to go) and then as the pedal is depressed that number should go near 0. If no Controller issue, if yes, maybe an F&R issue?
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Unread 08-12-2016, 07:09 AM   #3
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Default Re: 94 Medalist intermittent shutdown

I do have pack voltage on pin 1 running or not, pack voltage between b-/m- decreasing to zero as throttle is pressed when running and nothing when not running. Have to save up for a new controller, probably going to put the stock parts back in for now. I guess running on 36v is better than not running on 48v!
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Unread 08-12-2016, 07:25 AM   #4
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Default Re: 94 Medalist intermittent shutdown

Check your throttle signal. Controller is passing amperage sometime and not sometimes. Could be intermittent throttle signal.
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Unread 08-12-2016, 06:33 PM   #5
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Default Re: 94 Medalist intermittent shutdown

The throttle signal is 9.4v when solenoid engages then decreases to 5.4v when pedal is all the way down whether the cart runs or not. Today it ran every time I tried it.
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Unread 08-13-2016, 11:12 AM   #6
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Default Re: 94 Medalist intermittent shutdown

Quote:
Originally Posted by handtools View Post
I do have pack voltage on pin 1 running or not, pack voltage between b-/m- decreasing to zero as throttle is pressed when running and nothing when not running. Have to save up for a new controller, probably going to put the stock parts back in for now. I guess running on 36v is better than not running on 48v!
Does the red highlighted statement mean you have ~48V (Full pack voltage) between B- and M- and it stays at ~48V when pedal is pushed, or does it mean you have 0V between B- and M- whether pedal is pushed or not?

If you have pack voltage and it does not decrease, the controller is bad. (The throttle voltage is a bit off, but the cart should run.)

If you do not have pack voltage between B- and M- when the pedal is pushed just far enough to make solenoid click, the controller is okay and you have an open somewhere in the external cables, contacts or connections.
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Unread 08-13-2016, 06:16 PM   #7
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Default Re: 94 Medalist intermittent shutdown

Checked cart this afternoon and the first time I tried it, it would not run, I'm pretty sure there was no voltage on pin 1, and pack voltage at M- but did not decrease as pedal was pushed. I tried to confirm these but as soon as I let off the pedal and tried it again the cart ran and continued to run all afternoon. Intermittent issues suck! I'll keep trying!
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Unread 08-13-2016, 06:18 PM   #8
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Default Re: 94 Medalist intermittent shutdown

You just might try replacing the pedal box micro switch and if series cart. F&R micro switch on the drivers side. These are pretty cheap switches and likely culprits in the go or no go game.
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Unread 08-13-2016, 06:38 PM   #9
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Default Re: 94 Medalist intermittent shutdown

Scotty, yes it is a series cart and the F/R is your H/D switch. Are the micro switches something easily sourced locally or should I get them from you?
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Unread 08-13-2016, 06:40 PM   #10
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Default Re: 94 Medalist intermittent shutdown

Go to any golf cart shop and tell them what you are looking for. They should have it
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