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SVT Shelby GT500
VMP Performance
Charging system issue
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<blockquote data-quote="Regulars520" data-source="post: 14999072" data-attributes="member: 145759"><p>I did further testing tonight. I disconnected the battery and charged it to top it off. I put it in and used my meter and got a reading from the battery of 13.30-13.70 no higher. That was with lights and ac on. The check charging system was still on when reading this. i took it for a drive and then came back and put my meter on it again, now its reading 10.80-11.07 no higher. I pull the negative cable off while the car is running and its immediately shuts off. So I confirmed that at that time the alternator was not charging. So my question is, on these does the PCM tell the alternator to charge or does the alternator receive any commands to charge? I would think not, I would think it should be charging 14v all the time. I just want to be sure before I drop big dollars on a high amp alternator. Would suck if I still had the problem after.</p></blockquote><p></p>
[QUOTE="Regulars520, post: 14999072, member: 145759"] I did further testing tonight. I disconnected the battery and charged it to top it off. I put it in and used my meter and got a reading from the battery of 13.30-13.70 no higher. That was with lights and ac on. The check charging system was still on when reading this. i took it for a drive and then came back and put my meter on it again, now its reading 10.80-11.07 no higher. I pull the negative cable off while the car is running and its immediately shuts off. So I confirmed that at that time the alternator was not charging. So my question is, on these does the PCM tell the alternator to charge or does the alternator receive any commands to charge? I would think not, I would think it should be charging 14v all the time. I just want to be sure before I drop big dollars on a high amp alternator. Would suck if I still had the problem after. [/QUOTE]
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VMP Performance
Charging system issue
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