Aiden_400ex
Junior Member
I have a 2004 ram 2500 5.9 cummins and I noticed while sitting in a drive through my battery temperature was 135 degrees, after I got back on the road and was crazing at about 40 the temp went back down to the low 80's, outside air temp was about 60 degrees, got home and checked the driver side battery and it was fine but the passenger side wires looked like thisthe truck starts and drives completely fine but battery temp rises when idling after the truck is warmed up. I know the red wire is from my alternator, but not sure about the 2 black wires, what is causing them to get so hot? Thanks.