One battery gets really hot

sonofagunn · 12-28-2018, 08:49 AM

I have 4 brand new Trojan 12v batteries. After a ride, the one battery that has the 12v circuit attached to it has really hot terminals. The other batteries are fine. No 12v accessories but headlights. Any ideas?

Sergio · 12-28-2018, 09:20 AM

Make sure the battery cable is installed first and your 12v accessory ring connector is on top.

You should also consider a 48v->12v reducer if you use your accessories more than occasionally.

sonofagunn · 12-28-2018, 09:55 AM

The cable terminals are installed in that order. I should add that this happens even if I am not using the lights. I know heat generally means resistance, so what else has current flowing through the 12v side while underway? The FNR switch and key switch?

scottyb · 12-28-2018, 10:02 AM

Just a thought....
Try disconnecting the 12v accessories from the battery in question, run the cart. If the battery cable is in good order and the battery continues to heat up without the additional accessory wires this may be a defective battery.

Fairtax4me · 12-28-2018, 11:32 AM

Are the cables new or old?
Have you checked the voltage on the batteries before and after driving?

pattyandrick · 12-28-2018, 05:21 PM

You could try swapping a battery to that position see if the problem stays or moves. Or try swapping same length cables just to see if the problem moves with the cables or stays with the battery

Sent from my SM-J320V using Tapatalk

ThreeCW · 12-28-2018, 07:32 PM

Read the attached Trojan document about bad cable connections creating excessive heat.
Trojan - Faulty Connections Thermal Images.JPG

12-28-2018, 08:49 AM	#1
sonofagunn Getting Wild Join Date: Sep 2018 Location: Palm Harbor, FL Posts: 86	One battery gets really hot I have 4 brand new Trojan 12v batteries. After a ride, the one battery that has the 12v circuit attached to it has really hot terminals. The other batteries are fine. No 12v accessories but headlights. Any ideas?

12-28-2018, 09:20 AM	#2
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: One battery gets really hot Make sure the battery cable is installed first and your 12v accessory ring connector is on top. You should also consider a 48v->12v reducer if you use your accessories more than occasionally.

12-28-2018, 09:55 AM	#3
sonofagunn Getting Wild Join Date: Sep 2018 Location: Palm Harbor, FL Posts: 86	Re: One battery gets really hot The cable terminals are installed in that order. I should add that this happens even if I am not using the lights. I know heat generally means resistance, so what else has current flowing through the 12v side while underway? The FNR switch and key switch?

12-28-2018, 10:02 AM	#4
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,419	Re: One battery gets really hot Just a thought.... Try disconnecting the 12v accessories from the battery in question, run the cart. If the battery cable is in good order and the battery continues to heat up without the additional accessory wires this may be a defective battery.

12-28-2018, 11:32 AM	#5
Fairtax4me Bonafide Nincompoop Join Date: Dec 2015 Location: Charlottesburg Va Posts: 8,987	Re: One battery gets really hot Are the cables new or old? Have you checked the voltage on the batteries before and after driving?

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12-28-2018, 05:21 PM	#6
pattyandrick Getting Wild Join Date: Mar 2018 Posts: 76	Re: One battery gets really hot You could try swapping a battery to that position see if the problem stays or moves. Or try swapping same length cables just to see if the problem moves with the cables or stays with the battery Sent from my SM-J320V using Tapatalk
pattyandrick Getting Wild Join Date: Mar 2018 Posts: 76

12-28-2018, 07:32 PM	#7
ThreeCW Gone Wild Join Date: Nov 2016 Location: near Calgary, AB, Canada Posts: 1,516	Re: One battery gets really hot Read the attached Trojan document about bad cable connections creating excessive heat. Trojan - Faulty Connections Thermal Images.JPG

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