2 Controllers gone, maybe battery

BBourdage · 07-11-2008, 08:27 AM

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

roady89 · 07-11-2008, 08:31 AM

Do you have larger than stock tires?

BBourdage · 07-11-2008, 08:46 AM

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 ?

roady89 · 07-11-2008, 08:57 AM

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?

BBourdage · 07-11-2008, 09:02 AM

I have the stock 1510-5201, curtis controller (2003 IQ).

No direct patch, only through the stock interface on the curits.

roady89 · 07-11-2008, 09:12 AM

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.

BBourdage · 07-11-2008, 09:14 AM

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 ?

roady89 · 07-11-2008, 09:16 AM

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.

BBourdage · 07-11-2008, 09:19 AM

We did switch batteries, and had no issue, I am just afraid to burn another controller on it.

Thanks for your help

on18's · 07-11-2008, 08:33 PM

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

07-11-2008, 08:27 AM	#1
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16	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
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16

07-11-2008, 08:31 AM	#2
roady89 nimda Join Date: Jun 2007 Posts: 13,022	Re: 2 Controllers gone, maybe battery Do you have larger than stock tires?
roady89 nimda Join Date: Jun 2007 Posts: 13,022

07-11-2008, 08:46 AM	#3
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16	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 ?
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16

07-11-2008, 08:57 AM	#4
roady89 nimda Join Date: Jun 2007 Posts: 13,022	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?
roady89 nimda Join Date: Jun 2007 Posts: 13,022

07-11-2008, 09:02 AM	#5
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16	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.
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16

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07-11-2008, 09:12 AM	#6
roady89 nimda Join Date: Jun 2007 Posts: 13,022	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.
roady89 nimda Join Date: Jun 2007 Posts: 13,022

07-11-2008, 09:14 AM	#7
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16	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 ?
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16

07-11-2008, 09:16 AM	#8
roady89 nimda Join Date: Jun 2007 Posts: 13,022	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.
roady89 nimda Join Date: Jun 2007 Posts: 13,022

07-11-2008, 09:19 AM	#9
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16	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
BBourdage Not Yet Wild Join Date: Jun 2008 Posts: 16

07-11-2008, 08:33 PM	#10
on18's Getting Wild Join Date: Jul 2008 Location: odessa.fl Posts: 99	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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