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Wiring Problems

bige

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Need Help! Alternator went out

Need Help! Alternator went out on boat. I replaced it with new alternator. Started the boat and now the boat will not turn off. The engine will not stop. But you can pull the alternator terminal off and then the key switch will turn the engine off. It is a three wire GM 65 amp alternator on an 84 Mercruiser 140.
 
the 2 smaller wires are revers

the 2 smaller wires are reversed or the doide in the alt. went bad. alt. is backfeeding the ign. system.
 
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