i started my first ho on the trailer to see if battery is charged and barely turned over, went to second fxho and tried that one and cranked no problem. so i took out battery of first fx and charged for 30 minutes and same thing happened. I then took it out and ran it up the a auto parts store and he said it is 100% charged. so took it back home and figure i would swap battery form fx1 with fx2. well now that both will not turn over, i then swapped back to original configuration and still nothing on both, occasionally the unlock button will light up but thats it. WHAT DO I DO????