Check your alternator connector. I've heard that if the spade connector has corrosion, it sets up a barrier (resistance) which causes heat to build up. If that is the case, you should be able to find a replacement connector at the auto supply store...you might be able to test if that is the problem by using emery cloth (any fine abrasive) to polish the surface.

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..."The truth is that there is nothing noble in being superior to somebody else. The only real nobility is in being superior to your former self...” --Whitney Young