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07-11-2008, 08:27 AM | #1 |
Not Yet Wild
Join Date: Jun 2008
Posts: 16
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2 Controllers gone, maybe battery
I posted here a month ago, about a problem with a cart, when you press the pedal, you hear clicking, and that was it. After verifying all connections, and finally replacing controller, it worked again for a ride around the block.
The second controller went 4 minutes after the first controller. I took apart the controller, and found that both units had blown the 4 FS transistors. after talking to some people here were my options. 1. Motor was bad. I have the supplement manual for the vehicle, and verified motor was 1.9 ohms across F1,F2, and no short to chassis or motor body. 2. Light kit cabling was bad, I removed the whole light kit, no change. I think I am getting close, but I do not believe the answer, looking for help. I discconect all battery terminals. I measure DC volts from the positive terminal to the chassis, while the battery is sitting in battery base. 6 of the 8 batteries, measure nothing, 1 measures 1.1 volts, and 1 measures 3 volts. When I chain them together, I have a total of 8 volts from positive to chassis, without anything connected to the body. Here is the strange part, I have been told that if I have a black cased battery, it could have been made of recycled plastic, and that the carbon content can vary, to the point it will conduct. I actually was getting 8 volts rfom the battery case to postive when I started, and after cleaning all of the crud of the battery, I am down to 3 volts. Has anyone ever heard of this ?. Barry |
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07-11-2008, 08:31 AM | #2 |
nimda
Join Date: Jun 2007
Posts: 13,022
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Re: 2 Controllers gone, maybe battery
Do you have larger than stock tires?
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07-11-2008, 08:46 AM | #3 |
Not Yet Wild
Join Date: Jun 2008
Posts: 16
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Re: 2 Controllers gone, maybe battery
Yes, 22's, I have a couple of other carts with pretty much the same configureation, and this is the only one that blows the controller.
Does the short across the battery case make sense ? |
07-11-2008, 08:57 AM | #4 |
nimda
Join Date: Jun 2007
Posts: 13,022
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Re: 2 Controllers gone, maybe battery
How many amps on the controller? Is it a stock 235 amp?
Also...the transistors that are blown do they have a direct path from the A2 terminal? |
07-11-2008, 09:02 AM | #5 |
Not Yet Wild
Join Date: Jun 2008
Posts: 16
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Re: 2 Controllers gone, maybe battery
I have the stock 1510-5201, curtis controller (2003 IQ).
No direct patch, only through the stock interface on the curits. |
07-11-2008, 09:12 AM | #6 |
nimda
Join Date: Jun 2007
Posts: 13,022
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Re: 2 Controllers gone, maybe battery
Ok, didn't realize it's on IQ but thats ok. Does it blow controllers on hills or under load? I belive thats a 235 amp controller.
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07-11-2008, 09:14 AM | #7 |
Not Yet Wild
Join Date: Jun 2008
Posts: 16
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Re: 2 Controllers gone, maybe battery
No load, just sitting. Remember, it has done this to 2 controllers already, I did not want to put a third one on it, until I had this voltage problem solved.
What do you think about the voltage ? |
07-11-2008, 09:16 AM | #8 |
nimda
Join Date: Jun 2007
Posts: 13,022
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Re: 2 Controllers gone, maybe battery
Never seen it happen or heard of that. Todays batteries "should" not conduct power through the case. Only time I have seen batteries conduct is if there is water and/or battery acid, dirt etc on the batteries. Switch batteries with another cart and find out.
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07-11-2008, 09:19 AM | #9 |
Not Yet Wild
Join Date: Jun 2008
Posts: 16
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Re: 2 Controllers gone, maybe battery
We did switch batteries, and had no issue, I am just afraid to burn another controller on it.
Thanks for your help |
07-11-2008, 08:33 PM | #10 |
Getting Wild
Join Date: Jul 2008
Location: odessa.fl
Posts: 99
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Re: 2 Controllers gone, maybe battery
this my sound stupid but i seen some thing like this on a ezgo the guy put in a stereo and head lights and grounded them to the frame of the cart and not to batteries it burnt up controllers and 2 radios before he brought it to the shop and i traced burnt wires to the frame it was feeding back thew controller
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