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Unread 07-11-2013   #1 (permalink)
micahisme is offline Rookie


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Default Altenator/Battery Good But Still Have Problems

We have a 2006 Mustang with a 4.6L Engine. The "check charging system" light has been sporadically coming on at no certain times. Sometimes when this happens the windows and dash gauges stop working all together, but the radio stays on. A few seconds later and everything is fine. This problem started happening more and more until finally the other day the car died and wouldnt start back. I had the battery checked and it was good buy dead and needed a charge. Then I replaced the altenator and got it running but 3 minutes on the road and the car died. I have no idea where to go from here. Can anyone please give me some advice???
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Unread 07-12-2013   #2 (permalink)
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You most certainly have some sort of a short in your electrical system.....And the only way you are going to trace it to the problem is bringing it to a Good New car mechanic or a Ford dealer......Have you tried to open up your Fuse/Relay box under the hood to make sure everything is tight in their respective plugs?

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Unread 07-12-2013   #3 (permalink)
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So after you charged the battery did you have it tested? And did you check your plug ends at the alternator make sure they weren't burnt looking? And is it charging back to the battery? I believe on most new fords the computer regulates the alternator when to charge and not. I would check for voltage on the wires with key on. The main cable should have 12.5 volts, the small plug is two or three wire should have some voltage may be .5 volts maybe the battery is not holding the charge


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Unread 07-13-2013   #4 (permalink)
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Everything in the fuse/relay box looks good. The alternator points of power contact look good as well. I am about to test with the meter like you said Kloseman. I've heard that the computer could be bad and possibly the coil pack?! One thing I forgot to mention is that I had a diagnostic test on it and when the guy plugged it up he said that he could not get a reading. I don't know what's up with that. If the computer is bad is it possible that I would be having these problems and not be able to get a diagnostic check done?
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