I've got a 96 k1500 Silverado. Was on my way to work in the morning and lost running lights (amber ones on the front, and taillights) all of a sudden. When I looked into it, the fuse was blown. It's a 20A fuse. I put another 20A in, the second I hit the switch for parking lights, it blows. If I put a 25A or 30A, it gets screaming hot. I've obviously got a short somewhere, but where do I start?