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96 Ford F150 battery drain
and the battery was dead when I bought it so they
put a new battery in. Now, if the truck sets for 5
days the battery is dead. I had the dealer check
the battery and the charging system and he says
everything is okay. When I described the problem
to my brother-in-law, he immediately said there was
a bad diode in the alternator. Has anyone else
ever heard of this and if so, how do I test for it?
Can I replace just the diode or must I replace
the whole alternator?