Battery died, 6years old. Replaced battery and unknown driver appeared on dash. Would turn over and start and then shutdown. Let it sit overnight and new battery was dead. Recharged it and same diagnostic on dashboard. Pulled radio fuse and truck has been operating normally. Put fuse back in and everything was good. Next morning battery was dead again. I had an aftermarket radio (Pioneer) installed 5 years ago and have never had an issue with it. Anything else running off of the radio fuse that could be causing this drain, since the only way the truck operates now is with the fuse pulled. I also have disconnected the radio harness as well. Any suggestions would be appreciated. Thanks.