I have an 05 iq cart with 9 in lift and 25 in tires. Never had any problems before but saturday cart quit moving while I was riding it. I came to a stop and when I tried to start back it would just barely move. I cut power off and wiggled wires on the batteries and it started back. It then did it again, but it would start out very slowly then gradually pick up speed. I have one battery cable that looks a little corroded could that be the problem?? If so would it hurt to upgrade my cables to 4 gauge welding cable or would that not help anything. Any help would be greatly appreciated Im new to the electric carts and haven't quite figured them out yet.