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Old 03-10-2010, 18:05   #1 (permalink)
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2001 Excursion battery/alternator problem?

Today my battery light just came on , so I figured taking the positive battery cable off would tell me if it was the alternator. My question is, is it supposed to die when the cable is removed or should it stay running?
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Old 03-10-2010, 19:41   #2 (permalink)
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Re: 2001 Excursion battery/alternator problem?

Removing the battery cable on the newer vehicles can spike the PCM and burn it up. The PCM also controls the charging on most newer vehicles. The way to check it is with a volt meter. Running, the battery should show about 14V. If the battery is low, the voltage should increase at the battery when the engine is running as compared to off.
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Old 03-11-2010, 12:16   #3 (permalink)
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Re: 2001 Excursion battery/alternator problem?

Thanks for the info. It turned out to be the alternator after all which I had replaced this morning. Seems like everything is fine now.
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Old 03-11-2010, 17:32   #4 (permalink)
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Re: 2001 Excursion battery/alternator problem?

Glad to hear it's fixed. Thanks for the update.
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