Excessive Charging?

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  #1  
Old 03-03-07, 04:16 AM
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Question Excessive Charging?

Good Morning. 1991 Ford F150, 305 V8, At, Ps, Pl, Pw, A/c, 2X4. My charging guage shows my alt to be charging well past the center mark. When I put a load on with the pw, or the blower, it reduces to closer to the center. When I load with the radio or the lights it stay the same with no movement. The battery seems to be fully charged because it starts with no problem. Could this be the Alt, or the Batt. Thank you in advance for any info.
 
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Old 03-03-07, 05:33 AM
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I'd take it to autozone and have them test the alternator output, it might be the gauge. Usually a battery that does a lot of charging will "boil" out some of the water/electrolite so check that too.
 
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Old 03-03-07, 09:51 AM
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How old is the battery? As they age, they lose storage capacity and the alternator will have to work harder to keep the battery up.
 
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Old 03-03-07, 11:20 AM
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Could this be the Alt, or the Batt.
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Yes.

If the battery is bad, it can cause the alt to try to charge it and the high voltage is what you would see. As well, the alternator (or actually the voltage regulator but most regs are an integral part of the alt anymore) can allow a too high voltage.

Head on down to the 'Zone. They will put a tester on it for you for free and try to help you out.
 
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Old 03-04-07, 03:23 PM
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Thanks All, I will follow up per your suggestions
 
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