Not how, but WHY to bypass the OBC?

Matt01 · 04-09-2020, 04:00 PM

Hello Guys, I have received much help from the various threads and info on this forum, much thanks for that.

I just upgraded my 2011 I2 CC with a kit from ScottyB, highly recommend btw for fast shipping and good support.

2G Wires
Alltrax 500 controller
Upgraded Soleniod
Admiral A-2 Motor

Just finished bolting all this on, ran around the hood grinning like a dummy at 26mph with 33in wheels

Plugged in the charger and it wont charge.

I am lucky that my neighbor the same charger for his, I tried that and got same result so the problem is with the OBC or the Wiring.

My other neighbor has an ERIC charger for his so I should be able to bypass the OBC and borrow his to charge them up for right now, correct?

the bigger question is Why to bypass the OBC? is charging all that it controls now with the new motor, controller, etc.?

thanks for your opinion/help!

handtools · 04-09-2020, 04:55 PM

If the charger worked before the upgrades the OBC is not the problem. I would double check the wiring because if it is all wired correctly the charger should still work. That said if you want to get a smart charger you will have to bypass the OBC.

jakesnake27 · 04-09-2020, 04:58 PM

Yes, double check your wiring. It’ll work like it did before once wired correctly.

WalterM6 · 04-09-2020, 06:51 PM

Did you run the negative through the hole in the OBC or worst yet did you enlarge the hole in the OBC?

Matt01 · 04-10-2020, 08:25 AM

So i connected the Black wire from the harness to the NEG post 6 and the ERIC charger would do nothing. but my normal charger worked? it was obvious the OBC was not controlling it because it just cranked all the way up to max output and stayed there... i left it on for about 2 hours until the batts (measuring all the way across the pack with a multitester) was about 50.

I am very confident that I did not damage the OBC or make the hole bigger or such. I did use the screw with rubber washer and cables joined on each side as part of the kit.

I will double check all the wiring, thanks for the help!

Sergio · 04-10-2020, 09:41 AM

The old 6ga black cable that went through the OBC had another 10ga black wire crimped together at the Controller B- terminal lug.

Make sure that 10ga cable (OBC output) was connected to B- using a new 5/16" ring connector.

04-09-2020, 04:00 PM	#1
Matt01 Not Yet Wild Join Date: Mar 2020 Location: Cypress Tx Posts: 10	Not how, but WHY to bypass the OBC? Hello Guys, I have received much help from the various threads and info on this forum, much thanks for that. I just upgraded my 2011 I2 CC with a kit from ScottyB, highly recommend btw for fast shipping and good support. 2G Wires Alltrax 500 controller Upgraded Soleniod Admiral A-2 Motor Just finished bolting all this on, ran around the hood grinning like a dummy at 26mph with 33in wheels Plugged in the charger and it wont charge. I am lucky that my neighbor the same charger for his, I tried that and got same result so the problem is with the OBC or the Wiring. My other neighbor has an ERIC charger for his so I should be able to bypass the OBC and borrow his to charge them up for right now, correct? the bigger question is Why to bypass the OBC? is charging all that it controls now with the new motor, controller, etc.? thanks for your opinion/help!

04-09-2020, 04:55 PM	#2
handtools Gone Wild Join Date: Nov 2011 Location: S.E. Mi. Posts: 531	Re: Not how, but WHY to bypass the OBC? If the charger worked before the upgrades the OBC is not the problem. I would double check the wiring because if it is all wired correctly the charger should still work. That said if you want to get a smart charger you will have to bypass the OBC.

04-09-2020, 04:58 PM	#3
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245	Re: Not how, but WHY to bypass the OBC? Yes, double check your wiring. It’ll work like it did before once wired correctly.
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245

04-09-2020, 06:51 PM	#4
WalterM6 Gone Wild Join Date: Apr 2017 Location: SE TN Posts: 2,226	Re: Not how, but WHY to bypass the OBC? Did you run the negative through the hole in the OBC or worst yet did you enlarge the hole in the OBC?

04-10-2020, 08:25 AM	#5
Matt01 Not Yet Wild Join Date: Mar 2020 Location: Cypress Tx Posts: 10	Re: Not how, but WHY to bypass the OBC? So i connected the Black wire from the harness to the NEG post 6 and the ERIC charger would do nothing. but my normal charger worked? it was obvious the OBC was not controlling it because it just cranked all the way up to max output and stayed there... i left it on for about 2 hours until the batts (measuring all the way across the pack with a multitester) was about 50. I am very confident that I did not damage the OBC or make the hole bigger or such. I did use the screw with rubber washer and cables joined on each side as part of the kit. I will double check all the wiring, thanks for the help!

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04-10-2020, 09:41 AM	#6
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: Not how, but WHY to bypass the OBC? The old 6ga black cable that went through the OBC had another 10ga black wire crimped together at the Controller B- terminal lug. Make sure that 10ga cable (OBC output) was connected to B- using a new 5/16" ring connector.

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