Power draw issues

[marshmello]

We're having power draw issues and we have no idea what's causing them.
Our drive train is four cims, two tough box minis, and belts driving six 8" harbor freight tires. We're having this weird issue where we're drawing more power than we seem to be using, so much that the Rio kinda shuts itself down and driving becomes erratic and slow to respond.
We don't think it's a code issue, and we've replaced the cims, disassembled and reassembled the gearboxes, and checked the talon srx's we have on the cims multiple times. Someone brought up the idea that our wires were too small of a gauge, but we think they would be melting if that were the issue.
We have been having this problem since a little after we started driving last week. Any ideas would really be appreciated...