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SportTrac Discussion
Electrical
Alternator Dying-Updated 1/1/11
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<blockquote data-quote="TrainTrac" data-source="post: 943751" data-attributes="member: 55399"><p>Larry,</p><p></p><p></p><p></p><p>The method of testing that you described in the first paragraph above is exactly how both customer service reps and Advance and Auto Zone tested my Sport Trac, and both came to the conclusion that a bad diode in the alternator was slowly draining the battery. The Optima battery tested OK. I don't think that it's ever been <em>fully</em> discharged, it's just that if the Trac sits undriven for a couple of days, the battery is drained down low enough to not allow the engine to turn over. But it's responded to a jump right away, and continues to hold a charge as long as I drive the vehicle every day.</p></blockquote><p></p>
[QUOTE="TrainTrac, post: 943751, member: 55399"] Larry, The method of testing that you described in the first paragraph above is exactly how both customer service reps and Advance and Auto Zone tested my Sport Trac, and both came to the conclusion that a bad diode in the alternator was slowly draining the battery. The Optima battery tested OK. I don't think that it's ever been [i]fully[/i] discharged, it's just that if the Trac sits undriven for a couple of days, the battery is drained down low enough to not allow the engine to turn over. But it's responded to a jump right away, and continues to hold a charge as long as I drive the vehicle every day. [/QUOTE]
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SportTrac Discussion
Electrical
Alternator Dying-Updated 1/1/11
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