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Unread 07-14-2013, 03:39 PM   #1
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Default Possible OBC issue?

Okay guys, I had another thread on here about this but it was posted as I was in the process of testing everything and it was willy-nilly. My issue is with a 95 48 volt club car that will not go, not even a click of the solenoid, nor will it charge. The cart will run in both forward and reverse when solenoid is jumped, but solenoid is not the issue as I've put on a brand new one plus resistor and diode. Charger is fine, tested it on another cart and it works. ALL wiring and connections are okay and as they should be according to the wiring diagram. I am beginning to think the OBC is shot. Could this indeed be a bad OBC? If so, what can be done for replacement and is there a modification to not having one? Thanks in advance for any help/suggestions, I would really appreciate it!

EDIT: cart has the continuously variable potentiometer under the pedal, not a V-glide. It is also a series cart.

Last edited by 93yellowclubcar; 07-14-2013 at 03:41 PM.. Reason: more info
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Unread 07-14-2013, 03:52 PM   #2
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Default Re: Possible OBC issue?

try resetting the OBC

Resetting the Club Car On board computer - reset the OBC

To reset the OBC the following must be done in this order:

If no Tow/Run Switch then skip that step

• Key Switch to Off
• Forward/Reverse to Neutral
• Tow/Run Switch to Tow
• Disconnect the Battery NEGATIVE (–) wire from the Battery Minus terminal on the battery pack.
• Put the Tow/Run to Run
• Forward/Reverse Switch to Reverse
• Key Switch to On
• Lock the throttle pedal down

The reverse buzzer will sound and go off in about 30 seconds.
Leave the cart like that for 5 min to cause the OBC to reset.

To reconnect the OBC back into the system:
• Key Switch to Off
• Forward/Reverse Switch to Neutral
• Tow/Run switch to Tow
• Reconnect the Batt – wire to the battery minus
terminal on the battery pack.
• Tow/Run switch to Run
• Key Switch to ON

to by pass OCB
DO AT YOUR OWN RISK.…do not attempt unless you are familiar with electricity and electronics!
There are two ways to force the charger to turn on regardless of the OBC.

The first method is to disconnect the cart’s gray wire at the fuse near the charger receptacle. Then using a jumper wire, connect the receptacle side of the fused connector to the cart’s negative battery terminal. This will energize the charger’s 48V relay. If the charger doesn’t come on, it could be bad connections, wiring or charger relay.

The second method is to open the charger and remove the 120V wires from the relay and jump these together. This totally bypasses the relay and the OBC wire.
(If charger comes on but the charger ammeter shows 0 amps, check the fuse at the charging receptacle under the clear plastic cover.)

Both of these methods should both be temporary measures for troubleshooting, or as an emergency method of charging the batteries when they have been discharged so far that the OBC will not charge them.

The OBC provides the optimum method of charging the cart’s batteries. If the OBC is bad, it should be replaced.
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Unread 07-14-2013, 04:01 PM   #3
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Default Re: Possible OBC issue?

Thanks! I'll give this a try when I get back to the cart later and post results. Appreciate the quick reply! I'm just not familiar with the 48 volt system, more experience with 36.
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Unread 07-14-2013, 04:07 PM   #4
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Default Re: Possible OBC issue?

Quote:
Originally Posted by 93yellowclubcar View Post
Thanks! I'll give this a try when I get back to the cart later and post results. Appreciate the quick reply! I'm just not familiar with the 48 volt system, more experience with 36.
if OCB is bad there are ways around buying a new one

i got a 93 cc 36v but have worked on the 48v carts .. imho 36v best
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Unread 07-14-2013, 05:45 PM   #5
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Default Re: Possible OBC issue?

OK, I reset the OBC exactly as the instructions said and nothing happened, still a no click and no go. Jumped the OBC per the instructions to see if the charger would kick on and got a click from the charger but nothing else. The charger does work though, it works fine on another 48 volt cart we have sitting at the house. Am thinking that the not moving and not charging are the same issue, which is what led me to thinking the OBC may be bad. Anything else on one of these carts that could make it act like this?
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Unread 07-14-2013, 05:58 PM   #6
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Default Re: Possible OBC issue?

what is the voltage of the entire pack ?
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Unread 07-14-2013, 06:50 PM   #7
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Default Re: Possible OBC issue?

Quote:
Originally Posted by crash test dummy View Post
what is the voltage of the entire pack ?
50.0 volts
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Unread 07-14-2013, 06:59 PM   #8
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Default Re: Possible OBC issue?

thats at 80%... charger may not turn on, but should
here is state of charge chart
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Unread 07-14-2013, 08:02 PM   #9
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Default Re: Possible OBC issue?

I only tried the first method you described, I didn't have much time and may have jumped it wrong. I'll try the method where you jump the wires in the charger tomorrow and post the results. I'm becoming more and more confident its the OBC - this cart is really kickin my butt lol, I've never had this much trouble before
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Unread 07-14-2013, 08:56 PM   #10
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Default Re: Possible OBC issue?

this may help

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