Battery voltage question

Jefd · 11-15-2013, 01:05 PM

Hi, my question is , If I measure the battery voltage at the charger plug what should the voltage be? I'm reading 38v I know the battery is 50+. Is this because the - is going through the obc? Thanks jef

cgtech · 11-15-2013, 01:31 PM

Yep, cant get accurate voltage readings at charge plug on 48v CCs, dut to OBC.

Sergio · 11-15-2013, 01:33 PM

That is also good news... If you get between 36-42v when you place the probes on the charger port + and -, that means the SCR in the OBC is working properly. If the SCR was bad, you would get 0v.

Jefd · 11-15-2013, 01:40 PM

Obc not turning on charger! Why? At what point will it turn on?

Next question what are the outputs of the Curtis controller?

Dose it control + or - to the motor, and what terminals can I read the cart on jack stands?

jakesnake27 · 11-15-2013, 01:41 PM

So your cart is not charging???
Does it click when you plug it in or does the ammeter move any?

Jefd · 11-15-2013, 02:46 PM

Only jumping out gray wire to ground

Jefd · 11-15-2013, 03:54 PM

Got it, the lights, volt meter I put in go through a ristor mounted on the side frame rail on the side of the cart , it goes to the - side of the controller without this The volt meter sees 50 volts with inline it sees 47/48 volts

jjance · 11-15-2013, 05:53 PM

@Jefd Try something for me if you get a chance. There seems to be a lot of questions about chargers nor turning on. I'm wondering if a quick check for a broken gray wire or fuse would be to try driving it with the charger plugged in, If it moves the sense wire is broken. If not the wire is OK. If you would try that it would a good troubleshooting piece of advice in the future.

Jefd · 11-15-2013, 06:38 PM

The cart won't move with charger plugged into it! I also did a continuity test from the fuse to wher it goes onto the computer!

11-15-2013, 01:05 PM	#1
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32	Battery voltage question Hi, my question is , If I measure the battery voltage at the charger plug what should the voltage be? I'm reading 38v I know the battery is 50+. Is this because the - is going through the obc? Thanks jef
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32

11-15-2013, 01:31 PM	#2
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: Battery voltage question Yep, cant get accurate voltage readings at charge plug on 48v CCs, dut to OBC.

11-15-2013, 01:33 PM	#3
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: Battery voltage question That is also good news... If you get between 36-42v when you place the probes on the charger port + and -, that means the SCR in the OBC is working properly. If the SCR was bad, you would get 0v.

11-15-2013, 01:40 PM	#4
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32	Re: Battery voltage question Obc not turning on charger! Why? At what point will it turn on? Next question what are the outputs of the Curtis controller? Dose it control + or - to the motor, and what terminals can I read the cart on jack stands?
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32

11-15-2013, 01:41 PM	#5
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245	Re: Battery voltage question So your cart is not charging??? Does it click when you plug it in or does the ammeter move any?
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245

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11-15-2013, 02:46 PM	#6
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32	Re: Battery voltage question Only jumping out gray wire to ground
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32

11-15-2013, 03:54 PM	#7
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32	Re: Battery voltage question Got it, the lights, volt meter I put in go through a ristor mounted on the side frame rail on the side of the cart , it goes to the - side of the controller without this The volt meter sees 50 volts with inline it sees 47/48 volts
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32

11-15-2013, 05:53 PM	#8
jjance Gone Wild Join Date: Feb 2011 Location: Chattanooga TN Posts: 2,105	Re: Battery voltage question @Jefd Try something for me if you get a chance. There seems to be a lot of questions about chargers nor turning on. I'm wondering if a quick check for a broken gray wire or fuse would be to try driving it with the charger plugged in, If it moves the sense wire is broken. If not the wire is OK. If you would try that it would a good troubleshooting piece of advice in the future.

11-15-2013, 06:38 PM	#9
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32	Re: Battery voltage question The cart won't move with charger plugged into it! I also did a continuity test from the fuse to wher it goes onto the computer!
Jefd Not Yet Wild Join Date: Oct 2013 Posts: 32

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