Hello! I have a 2010 Sonata that will no longer start without a jump. Battery tested 12.7 but needed a jump to 14 to start. No power at all when not jumped. In the few weeks prior to car quitting all of a sudden my husband noticed the interior car light was dimmer than normal but that is all. Worked great until it just wouldnt start. The mechanic said he found the body ground had a 9.8 volt positive charge as well. They removed the harness wire from fuse box that feeds alternator and positive charge went away. Alternator was replaced andcharge remained. Visually inspected wiring - no obvious issues. Need to take it 90 miles away to an electrical specialist - hoping someone might have insight before going on a wild goose chase and spending a fortune. Hope someone can help. Thanks!