Question about 1997 Mazda Protege

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Alternator runs hot when battery is connected

I'm convinced that it would be a short that is creating strain on the alternator, but I cannot find the short, and the battery stays charged over night enough to start in the morning... is there something i'm missing?

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When you start the car you need to see if the alternator charge its supposed to 13,7 to 14.5 max it supposed to stay like that but the way our taking its probably charge ok when its cold and when the car get warm the charging goes down in the back of alternator our supposed to have the same voltage as the battery if not check the big wire in the back for corrosion if our not sure the wondition insted of opening the wire harness bring direct power from the positive side of battery to the big wire in the back of alternator and from the negative side connect to the metal of alternator after that if its still get to hot change the alternator if you think my solution is intelligent please rate it thats the way i would check our caqr in my shop thanks pierre

Posted on Jul 30, 2009


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Is that correct?
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Go to an auto parts store like Advanced Auto Parts and have your battery and alternator tested (they do this for free) and may be able to verify that you have a power draw somewhere!
A jury rig fix would be to put a battery disconnect (available at any auto parts store and pretty easy to install) at the terminal to the battery and disconnecting every night but that won't fix the power draw.
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