I have a 57 Chris craft that is powered by a 1992 marine power 4 cyl. From the ignition/key there is a relay that splits and one leg goes to the fuel pump, one leg to the alternator, and one leg to the ignition coil. I have deciphered that either the relay was bad or something is causing the relay to burn out. So I can bypass this relay to each component individually and it fires up. Then i bought new relays which I can replace the 12$ relay and it fires up but immediately burns out the relay. What could cause the relay to burn out like this. It has been working wonderfully up to this point.