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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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Thread Tools | Display Modes |
05-24-2011, 08:11 AM | #1 |
Not Yet Wild
Join Date: Nov 2010
Location: Prince George Va.
Posts: 12
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91 marathon controller
does anyone know a simple way to test a controller? I think mine has gone bad. It runs for a while then slows downto a crawl then stops. I just put a new solinoid on it. Could it be the pot assembly? Or does it sound like the controller. Could it be the motor?
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05-24-2011, 08:31 AM | #2 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: 91 marathon controller
Disconnect 2 wires from the pot to the controller stick the 2 test leads in the 2 wire connectors on the pot wires. Set DVM to 20k ohms and watch the meter as you depress the peddle. The reading should rise to 5-6k ohms.
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05-24-2011, 08:33 AM | #3 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: 91 marathon controller
With the cart on jack stands:
Do not rev the motor up hard while on jacks they can over spin and explode. Probably would be best to disconnect the motor leads from the controller first then test output. Check the power output from the controller by connecting the negative probe to the controller's M- terminal and positive to the B+ terminal. Press the accelerator and watch to see if the voltage increases. It should increase from a reading of 0 to the full voltage of the battery. If the motor is not turning, the problem may be in the directional switch or motor. The controller is bad and must be replaced if there is no voltage. I probably should mention controller test is done with at least one rear wheel jacked off the floor and key on, directional selector in forward. ~ test leads on B+ and M- should read 0v then push the gas and watch the voltage rise to full pack voltage? |
05-24-2011, 08:33 AM | #4 |
The Last Moja Morani
Join Date: Jan 2007
Location: jumping from cart to cart
Posts: 8,975
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Re: 91 marathon controller
have you tested, load tested and checked the S/G on each battery? if not start there and check cables while your at it......................
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05-24-2011, 02:27 PM | #5 |
Not Yet Wild
Join Date: Nov 2010
Location: Prince George Va.
Posts: 12
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Re: 91 marathon controller
I have checked batteries they are all good. thanks for all the posts
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06-26-2012, 12:19 PM | #6 |
Not Yet Wild
Join Date: Jun 2012
Posts: 6
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Re: 91 marathon controller
I'm having a similar problem. Does no voltage from M- terminal and positive to the B+ terminal mean the controller is dead for sure, or can this be caused by something else. My Pot is not reading 5-6k ohms either. Does one cause the other?
91 Marathon. |
06-26-2012, 04:25 PM | #7 | |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: 91 marathon controller
Quote:
Does the solenoid click when you try to go? If no, you are probably not getting any power to the controller at B+. You can verify this with a voltmeter. You should have full pack voltage between B+ and B- when the solenoid clicks.... Let us know. Marathon pot should measure 0-5k through it's travel. |
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06-26-2012, 11:38 PM | #8 |
Not Yet Wild
Join Date: Jun 2012
Posts: 6
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Re: 91 marathon controller
The solenoid is clicking, and I'm getting 37.9v from B+ to B-. The pot is measuring 0-6k. I appreciate the help.
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06-26-2012, 11:58 PM | #9 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: 91 marathon controller
So far so good. Put test leads on B- and M- on the controller. Press the gas until the solenoid clicks, right then you should read the full battery pack voltage between B- and M-. Continue to press the peddle down and watch the controller empty of voltage. This confirms the controller is powering up and putting out the voltage to the motor.
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06-27-2012, 06:36 PM | #10 |
Not Yet Wild
Join Date: Jun 2012
Posts: 6
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Re: 91 marathon controller
The voltage starts in the high 20's without pressing the pedal, and goes to full voltage as the pedal is pressed down.
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