I've got a green wire going to the alt plug, and red wire that used to go to the alt plug, it's a thicker gauge, maybe 10 with a little black thing right before the alt plug (fuse?). And I've got the charging wire from the alt to battery. I'm only getting 12.2 volts from my meter. I hooked up the old red wire directly to the battery, the one that used to plug into the alt. Does anybody know why it's not charging?