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Blazer Battery goes dead.

My 2001 Blazer will not start. New battery when running over 14 volts charging. But seems top drain the battery. if i disconnect the battery after use it is fine. I had a 94 Bravada did the same thing, the guy I purchased it from put a cut out switch right at the battery. But what a pain to open the hood after each use and flip the cutout. I see this is a common problem from all the posts but did not find a common solution.. help!


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