I'm using an older style Ranger plug on my Ultrex and lately it hasn't had the balls it use too,I checked my batteries both at 12.71 and made sure connections were tight and clean went to the plug to make sure I was getting 24volts to the motor and found a wire that was burnt at the end next to the connection to plug. So I found another plug my spare in the cellar and I'm going to replace the burnt connection and plug .My question is on the older ranger plug it has a jumper from one hole to the next,do I leave that on or remove it the plug that I have on there now doesn't have one it is on the negative side if that matters?? By the way I'm getting 25.2 at the plug IMG_6797.JPG IMG_6798.JPG