Does anyone know why this safety light could be on? I had John Deere install a new wiring harness when i bought it used. I had it running last year but then the batteries died. They wouldn’t hold a charge so I replaced all 8 batteries. Now, it’s showing a full charge but it will not move. Power but that’s it. The safety warning light is on so I didn’t have it on for long. Any help would be greatly appreciated !