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Old 01-19-2009, 08:46 PM   #1
jav2.5
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Default Battery light question?

Well I went to start my car this morning and the little red battery light came on my dash. But let the car warm up, and after a few minutes the light was off. I know this light comes on with a charging problem like the alternator, but by it going off after a few minutes. Does this mean its the alternator or is it the battery? Thanx, dont have any equipment right now to test it. BTW, its a 2001 Impreza 2.5 RS
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Old 01-19-2009, 11:55 PM   #2
03outbacksport
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Does your owners manual tell you anything about it? I have no clue...just wondering
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Old 01-20-2009, 01:09 AM   #3
williaty
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That light indicates that the alternator is not charging the battery (the net flow is out of the battery, which is bad). It doesn't tell you why that is happening. The most likely explanation is that your alt is dead. Pull it off the car and an autoparts store will test it for you.
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Old 02-09-2009, 11:46 AM   #4
jav2.5
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Found the problem, the belt wasnt tight enough. Tightened it up, and the light hasnt come on since. Thanx guys.
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Old 02-09-2009, 02:35 PM   #5
Qman
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Quote:
Originally Posted by jav2.5 View Post
Found the problem, the belt wasnt tight enough. Tightened it up, and the light hasnt come on since. Thanx guys.
That was my guess. It could also mean that the battery is starting to lose charge. The cold can do that to batteries.
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Old 02-09-2009, 02:37 PM   #6
Qman
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Quote:
Originally Posted by williaty View Post
That light indicates that the alternator is not charging the battery (the net flow is out of the battery, which is bad). It doesn't tell you why that is happening. The most likely explanation is that your alt is dead. Pull it off the car and an autoparts store will test it for you.
Most auto parts store have equipment that you can use to test the charging system on the car. The fact that the light went out indicated that the alt was working still.
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Old 02-09-2009, 03:26 PM   #7
DC16A2
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You also most likely wouldn't have had to lift the alternator out to test it. I've seen alternators tested while still running on the vehicle.
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