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Unread 08-26-2014, 07:03 PM   #1
Not Yet Wild
 
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Default I presume that the OBC is bad?

Somehow I've become the family golf cart mechanic...

My sister's cart (~98 48V DS) won't charge. It gets plugged in, the charger comes on and then it shuts off within a few minutes regardless of how charged the batteries are. We have tried 3 different chargers with the same result.

I bypassed the OBC. Now the cart charges fine. I presume that there is no other likely issue other than a bad OBC?

Assuming that is the case it is my understanding that she has the following 2 options:
1. Replace the OBC
2. Bypass the OBC, get a smart charger and sell the old one.

Am I correct?
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Unread 08-26-2014, 07:27 PM   #2
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Default Re: I presume that the OBC is bad?

Have you upgraded the battery cables?
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Unread 08-26-2014, 08:31 PM   #3
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Default Re: I presume that the OBC is bad?

Quote:
Originally Posted by TahoeDawgZ71 View Post
Have you upgraded the battery cables?
No. Also, the cart is a Regen if that matters.
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Unread 08-26-2014, 10:16 PM   #4
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Default Re: I presume that the OBC is bad?

Sounds like a bad OBC. The reason I asked about the cables is because a lot of times people will upgrade them and choose to run the new negative cable around the OBC rather than through it. That will cause these symptoms.
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Unread 08-28-2014, 09:13 AM   #5
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Can I drive the cart with the jumper in place? Or is there some sort of safety interlock?
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Unread 08-29-2014, 12:10 AM   #6
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Default Re: I presume that the OBC is bad?

Quote:
Originally Posted by Luke Duke View Post
Can I drive the cart with the jumper in place? Or is there some sort of safety interlock?
What jumper?
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Unread 08-29-2014, 01:56 AM   #7
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Default Re: I presume that the OBC is bad?

Quote:
Originally Posted by Luke Duke View Post
Can I drive the cart with the jumper in place? Or is there some sort of safety interlock?
Quote:
Originally Posted by TahoeDawgZ71 View Post
What jumper?

Quote:
Originally Posted by Luke Duke View Post

I bypassed the OBC. Now the cart charges fine. I presume that there is no other likely issue other than a bad OBC?
probably the OBC jumper from fuse to neg on battery pack

yes you can run it with jumper .. but i would not
Quote:
Originally Posted by Luke Duke View Post
2. Bypass the OBC, get a smart charger and sell the old one.
remember when OBC is bypassed the charger will not shut off so you need to monitor charge carefully or you will ether over charge or undercharge batteries
i think they need to be around 60v to be fully charged at shut off
then should be 50.9v after 12hr rest

get a DPI charger


http://www.cartsunlimited.net/48v_Battery_Charger.html
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Unread 10-13-2014, 09:57 PM   #8
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So now I have the same problem on my cart ('98 DS). I installed the jumper but the charger only puts out about 2A. The cart only had about a 40% charge at the time. Does anyone know why it wouldn't be putting out the full 15A?
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Unread 10-13-2014, 10:26 PM   #9
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Default Re: I presume that the OBC is bad?

Which charger are you using? What's the 5 digit model number?
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Unread 10-14-2014, 12:31 PM   #10
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I'll post the model when I get home. I tried 2 different model chargers.
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