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



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Unread 09-30-2013, 05:26 AM   #11
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Default Re: ezgo controller testing

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Originally Posted by eejay001 View Post
the terminals in my controller has a1, b-, b+, f1, & f2 respectively. where is the m- terminal that i should attach the dvm? tnx
The M- terminal on a stock PDS controller (Curtis 1206MX) is labeled A1.
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Unread 09-30-2013, 10:17 AM   #12
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Default Re: ezgo controller testing

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Originally Posted by kingcobra View Post
johnny i gave it a shot what i came up with is this the only way i can get the 4 ohm reading is by placing the probes from my meter on the left and right side of the forward reverse switch it gives me this reading in forward and reverse if i try to get a reading from the bottom like is shown in your diagram i get a big fat 0 ohm reading not sure if this gives you any clues thanks for all your help
0 is good you are looking for less than .4 ohms
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Unread 09-30-2013, 07:12 PM   #13
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Default Re: ezgo controller testing

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Originally Posted by JohnnieB View Post
The M- terminal on a stock PDS controller (Curtis 1206MX) is labeled A1.
He stated he had a '94 model Medalist, Series.....if its got a PDS controller on it, it ain't gonna run, is it?!
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Unread 10-01-2013, 06:21 AM   #14
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Default Re: ezgo controller testing

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Originally Posted by Knothead View Post
He stated he had a '94 model Medalist, Series.....if its got a PDS controller on it, it ain't gonna run, is it?!
You are both right and wrong.
What you said is technically correct, but my reply was not to kingcobra,the OP with the 1994 Medalist Series cart, it was to the thread hijacker, eejay001, who listed the terminals on a PDS controller.
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Unread 10-01-2013, 07:41 AM   #15
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Default Re: ezgo controller testing

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Originally Posted by JohnnieB View Post
You are both right and wrong.
Story of my life!
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Unread 10-01-2013, 07:46 AM   #16
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Default Re: ezgo controller testing

Must be nice. Around here, I'm either wrong or ****ING WRONG!!
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Unread 10-01-2013, 08:32 AM   #17
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Default Re: ezgo controller testing

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Originally Posted by yurtle View Post
Must be nice. Around here, I'm either wrong or ****ING WRONG!!
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Unread 06-28-2015, 11:04 AM   #18
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Default Re: ezgo controller testing

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Originally Posted by JohnnieB View Post
First - Charge your batteries.
Their State of Charge is only 65% and the plates are sulfating as we speak.

It is best to start troubleshooting (or a drive) with a fully charged battery pack. (38.2V)

A 94 Medalist could have either a Series drive or a DCS drive, which do you have?
(If there is a Run/Tow switch on controller cover, it is a DCS)

The phrase: "at first 2 posts on controller" is relative to the the position a person is viewing from. The posts are labeled B+, B- and M- and depending on type controller, there could be one labeled A2 as well as a pair of smaller posts labeled F1 & F2.

If the solenoid does not click when throttle pedal is pushed, troubleshoot the solenoid activation circuit.
If the solenoid clicks when pedal is pushed, you should have full battery pack voltage on both main terminals of solenoid.
If you do, attach DVM test leads to B- and M- posts on controller.
When pedal is pushed just far enough for solenoid to click, you should read full pack voltage.
If you don't, you have a open somewhere in the high current circuit.
If you do, slowly press pedal to floor. (Be sure to have rear wheels off ground while doing this, or cart might run over someone or something.)
As pedal is pressed to floor, the voltage should decrease to near zero.
If not, either controller or ITS circuit is bad.

Good luck.
I get a reading of about 26 v on the controller side of the solenoid when the solenoid is not activated. When I activate the solenoid by pressing the accelerator I get full 38.4 v. Test lead on B- and M-....accelerator slowly to the floor.....no change in voltage....38.4 V. Bad controller? Why do I get the 26 v with the solenoid not activated? Connections removed from the large lugs on the solenoid I get 0.04 ohms reading across the lugs. Bad resistor?

Rick
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Unread 06-28-2015, 12:32 PM   #19
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Default Re: ezgo controller testing

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Originally Posted by rmauthe View Post
I get a reading of about 26 v on the controller side of the solenoid when the solenoid is not activated. When I activate the solenoid by pressing the accelerator I get full 38.4 v. Test lead on B- and M-....accelerator slowly to the floor.....no change in voltage....38.4 V. Bad controller? Why do I get the 26 v with the solenoid not activated? Connections removed from the large lugs on the solenoid I get 0.04 ohms reading across the lugs. Bad resistor?

Rick
It would probable be best to start a new thread rather than hijacking a three year old one that has already been highjacked.

The voltage between B- and M- not decreasing towards Zero as pedal is pushed towards floor could be a bad throttle input to the controller, or a bad controller.

The 26V is lower than expected. Should be pack voltage less about 5V.
The pre-charge resistor for a 36V system is typically in the 200Ω to 250Ω range and either 5W or 10W.

The resistor probably isn't bad. And will not prevent the voltage between B- and M- from varying when pedal is pushed.
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Unread 07-21-2015, 12:21 PM   #20
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Default Re: ezgo controller testing

Good Info
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