I hooked up a trailer that wasn't properly grounded to my 2003 Baja and now the taillights and parking lights are always on unless I pull the #5 10a fuse. I've disconnected the small trailer lighting box near the hitch and it didn't help. I've been told to check the relays in the main fuse box but they are not labeled so that I can tell which one might be right. Since the relays seem difficult to remove, I'm hesitant to do more without further guidance. Any suggstions?