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Unread 02-13-2010   #1 (permalink)
Stang01GT is offline Rookie

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Default 2001 Mustang GT battery light problems

Lately I have had my battery light come on at random, sometimes flashing quickly or staying on for 30 seconds at a time. It usually happens when the car has been running for more than a half hour. I replaced the battery less than a year ago and one of the terminals. My gauge never drops or moves period, it stays right where its supposed to. Anyone have any ideas on what could cause this?
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Unread 02-14-2010   #2 (permalink)
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You know I was just about to post the same question..

Mine started a few months ago. I had AutoZone test the battery and alternator. The battery turned out to be bad "it was the original battery and the indicator was red" so I replaced it. When I replaced it I cleaned all connections and have not had any problems until 2 days ago.

So the battery light comes on at random like stated above. Sometimes I can just rev the motor and the light will go out... The light only does this for maybe a minute and then everything is normal again.

My first thought is that the alternator is going out or the terminals are dirty but I just had the alternator tested and it was ok so I have no idea.
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Unread 02-14-2010   #3 (permalink)
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Ya mine does the same thing when i rev the motor, ive had the light flash on and off at random, for different lengths of time. Last year i was also havin electrical problems with a ground that was not hooked up properly. I tried everything including changing the alternator. Turned out it was not that and i found out the ground wire on on the block was loose. Im hoping that i didnt fry anything when this was going on. So i changed the battery and busted a terminal when i did, so i replaced that. Havent had any problems for about a year until a few weeks ago when the battery light started coming on at random. Let me know if you find anything out about the situation!
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Unread 02-14-2010   #4 (permalink)
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yea mine was doing it too. turns out the nut on the alternator from the batterie was loose and needed to be tightened.
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Unread 02-15-2010   #5 (permalink)
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I have a 2001 GT and had the same problems. I went to go to get a diagnostic code. They said camshaft sensor and bad battery. So I changed the sensor first cause its cheap like $10 but battery light still flash or stays on. Then a friend said it was the ALTERNATOR! and then it was fixed no more battery light flash

Problem- Alternator going bad
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Unread 02-15-2010   #6 (permalink)
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It could be, im wondering if its a connection somewhere. Lately we have had alot of snow and road salt, and wondering if it could be a connection on the alternator or something just not gettin a good enough ground. Im takin it to the Ford dealership this week to get looked at.
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