I have a 2005 brute 750 with approximately 240 hours on it. I went riding in the mountains a couple of weeks ago and about halfway through the ground cable came loose. I immediately pulled over and fixed it and continued to ride. Somewhere about that time and I'm unsure if its related, my 4x4 quit working. I have no flashing lights, it just won't switch into 4x4. I've already tested the actuator, the front differential, replaced the controller, and cleaned the switch. I replaced (30 amp fuse was melted but not blown) all fuses and repaired the Buss connector. I'm totally stumped and don't know what else to do. My engine brake works and the speedometer works. Is it possible for the speedometer to work but speed sensor for 4x4 to not work? I need help and things to try next. Please. I'm desperate haha.