Well, it seems that you have a short somewhere. There is a tool that is very useful for finding these problems. It is a electrical probe. The best way to go about this is just start testing your taillight wires. If you need to know what your taillight wires are, go to your dealership and they may be able to print you off the schematic with your wire colors. This should also help you figure you what those danglers are. If testing is not your idea of a good time. You can replace sections of wire until it is fixed. NOTE: This is very teadous and does not always prove to be the best method right from the start. Also if you could include the car make and model it would give us all a better way to help you.