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Unread 11-26-2018, 06:53 PM   #11
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Default Re: Brand new batteries, no charge 48v

One more thing I just checked, after the charger clicks I get 62v at the back of the receptacle, before it clicks I get 36.. ammeter still shows 0 though
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Unread 11-26-2018, 06:56 PM   #12
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Default Re: Brand new batteries, no charge 48v

That is why I said "hopefully"... the other component in the negative path from the charger receptacle to the battery is the OBC itself.

Check the 10ga black wire from the charge receptacle to the OBC.

Also check the 10ga black wire from the OBC to the connection block then to the Controller B-.
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Unread 11-26-2018, 07:33 PM   #13
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Default Re: Brand new batteries, no charge 48v

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Originally Posted by Sergio View Post
That is why I said "hopefully"... the other component in the negative path from the charger receptacle to the battery is the OBC itself.

Check the 10ga black wire from the charge receptacle to the OBC.

Also check the 10ga black wire from the OBC to the connection block then to the Controller B-.
The wire looks good going into the OBC but itís sealed so I canít check resistance, the wiring coming out of the OBC looks good also but the connection block is pretty corroded and I was afraid to try and loosen it, there is little resistance between the two wires though. I sprayed WD40 on the connection and Iíll try loosening it tomorrow, the mosquitos are killing me. Thanks for the help
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Unread 11-26-2018, 07:50 PM   #14
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Default Re: Brand new batteries, no charge 48v

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For the Series carts You just have to disconnect the Yellow wire from the OBC and run it directly from Solenoid to controller B- (or other negative source like pack negative).
OBC Bypassing


Silly question maybe, can I bypass the OBC following these instructions to just see if the charger kicks on or completes the ground circuit?
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Unread 11-26-2018, 08:26 PM   #15
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Default Re: Brand new batteries, no charge 48v

Yes, but not those directions as You have an IQ (Sepex) cart and not a Series cart.

You can run the negative wire from the back of the charger receptacle directly to pack negative, Controller B- or that negative wire junction.

You may also need to run the gray wire directly to negative as some versions of the OBC will not run if they are not in total control of the charging.
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Unread 11-26-2018, 08:33 PM   #16
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Default Re: Brand new batteries, no charge 48v

Okay, so jumping from pack negative to the black wire on the back of the receptacle nets me a full amp charge...
safe to say the OBC is dead?

Thanks for all the help btw, the forum has great info.
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Unread 11-26-2018, 08:49 PM   #17
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Default Re: Brand new batteries, no charge 48v

Unless that negative connection block is really bad, the SCR inside the OBC has failed and it is not allowing the current to flow from the charger receptacle.

You can do the rest of the by-pass (controller lockout for Sepex) and consider getting a smart charger that does not need the OBC.
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Unread 11-26-2018, 08:52 PM   #18
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Default Re: Brand new batteries, no charge 48v

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Originally Posted by Sergio View Post
Unless that negative connection block is really bad, the SCR inside the OBC has failed and it is not allowing the current to flow from the charger receptacle.

You can do the rest of the by-pass (controller lockout for Sepex) and consider getting a smart charger that does not need the OBC.
Got it, thanks again. Do you recommend bypassing and getting a smart charger over just replacing the OBC?
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Unread 11-26-2018, 09:00 PM   #19
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Default Re: Brand new batteries, no charge 48v

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Thanks, I see youíre in Ft Lauderdale. I am in Loxahatchee
Yeah your about 60 miles north of me. The mosquitoes are big around you
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Unread 11-26-2018, 09:07 PM   #20
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Default Re: Brand new batteries, no charge 48v

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Yeah your about 60 miles north of me. The mosquitoes are big around you
Tell me about it, even with the garage door closed theyíre chewing me up.. doesnít help t gets dark so early.
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