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Old 09-27-2010, 07:43 AM   #1
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Default Charger won't shut off

I have a 1995 club car ds. I leave the charger on all the time. I noticed the other day that the charger was still running. It had been on for about 5 days since I last used the cart. It was still charging at 3 amps. I made a mistake when I used it last as I unpluged it before the charging was done. I used the cart for about 15 min, pluged it in and 5 min later had to use the cart and unpluged it before the charger had shut off. Do I have a bad battery, and if so how do I best check them, or does the OBC need to be reset. Thanks for the help. I just purchased this golf cart a couple weeks ago and am new to this forum.
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Old 09-27-2010, 08:22 AM   #2
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Default Re: Charger won't shut off

I believe there is no reset on the 1st generation OBCs. (1995 being the first year). It is likely you have a bad battery... 5 days could cook the whole pack 1st thing to do is check to see if there is any water left in em after being on charge sooooo long.

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Old 09-27-2010, 09:43 AM   #3
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Default Re: Charger won't shut off

jracer, you may have a bad battery. I just bought mine a few weeks ago and had similar issues and it turned out to be a bad battery. First things first, check and fill battery fluid if necessary. If you don't have a multi-meter, it's a good investment and not that expensive. They are intimidating devices if you are like me and know very little about electronics but you really only need to know a fraction of what they can do.

You can get the batteries tested and see if you can find a bad one, or more. You can get a hydrometer and test every cell in each battery and see if you can spot a bad one or more.

My cart has 4 12v batteries. My first step was to buy a multi-meter. Paid less than 20 bucks for it and I think it's decent and accurate. My problem was that all of the batteries seemed to be taking a charge okay but the charger was never cutting off, it would just time out after like 16 hours. But the cart ran great and seemed to give a good run-time. It just so happened that, when I bought and installed a light kit, the battery I hooked my lights to was the bad battery. The lights would go dim and out in just a short time. So, I swapped another battery for that one and the lights worked fine. But the cart still wouldn't fully charge. After charging the cart, I checked the voltage on the entire battery pack using my meter and then each battery individually. All seemed okay right after charging. But after putting any load on the cart at all (i.e. riding it), that one battery started to lose voltage very quickly while the others stayed okay. I'd ride the cart a bit and then stop and check the voltage on that battery with a meter. I'd have 3 batteries showing 12.6volts and that one showing 10.4volts after just a short amount of time.

Load may be the key, though. Another test I did was to take the battery out of the cart and put it on a trickle charger. After charging it up, I checked it periodically over the course of a day or so and it seemed to be holding fine. But, I put it back in the cart and starting using it and the voltage would quickly go down. Fortunately, the guy I bought the cart from had some good batteries almost the same age as mine and was willing to swap it out for me. And all seems to be good since then.

Bottom line, you could pull all of the batteries and go have them load tested and find the culprit(s) pretty quickly. Or you can use some trial and error and figure it out for yourself. But it's probably best to suspect the batteries first and then look at other things if those check out okay. Assuming you've checked for and cleared any corrosion at the terminals and made sure the cables were all connected well and in good condition.
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Old 09-27-2010, 10:26 AM   #4
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Default Re: Charger won't shut off

I did check the water and it was low, to the top of the plates, not below them. I guess I will go purchase a volt meter and or hydrometer to check and see if I have a bad one. There terminal are all clean. I have 6 8v batteries. Do you know what the reading in a hydrometer and or volt meter should be for 8v batteries. Thanks to the both of you for the help.
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Old 09-27-2010, 10:43 AM   #5
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Default Re: Charger won't shut off

There is a state of charge and Specific Gravity chart in the "stickies"
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Old 09-27-2010, 10:45 AM   #6
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Default Re: Charger won't shut off

Refer to the chart in this sticky: State of Charge Readings

The specific gravity column is what you are looking for on the hydrometer.

Also, I've learned early on not to just leave the cart plugged in and assume it will charge and cutoff. You should probably take the same lesson. Go back and check it and if it's done, unplug it. If it is not and it has been too long, start troubleshooting.

I'd by the multimeter over the hydrometer if only getting one of them. It can tell you a lot even when you aren't having issues. Another option is to install a volt meter on the cart but that's only going to give you the pack reading, not each battery.
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