Isn't the burned and melted connector scary? I can't believe Ford doesn't do anything about it. Anyway, get one from Ford. They're not that expensive. You just crack off the old connector trying not to damage the pins. Then you just insert the pins into the new connector. You, of course, have to make sure you get the right wires in teh right holes.
I replaced mine about a month ago.
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351W 89 Mustang GT Convertible