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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 12-19-2004, 05:28 PM   #1 (permalink)
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On my 1989 325 I put in a new alternator and battery. The car will run for a wile then die. When I test the system I only getting 12.4 volts. I cleaned all the wires. The light on the dash comes on when you start the car then will go off. When I drive I can drive for about 30 min. then the car will die. Why an I only getting 12.4 volts out put from the alternator?
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Old 12-19-2004, 07:13 PM   #2 (permalink)
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maybe you hooked it up wrong....

take it off and have it tested.
have the battery tested also.
maybe you got a bunk alt. it happens, was it a remanufactured alt or brand new? what brand?
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Old 12-19-2004, 07:18 PM   #3 (permalink)
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Originally posted by Speedy-325is@Dec 19 2004, 07:13 PM
maybe you hooked it up wrong....

take it off and have it tested.
have the battery tested also.
maybe you got a bunk alt. it happens, was it a remanufactured alt or brand new? what brand?
[snapback]254420[/snapback]
New on. It hooked up right. What volts is it sopost to be?
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Old 12-19-2004, 08:34 PM   #4 (permalink)
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13.5 volts on a fully charged battery and 14.25 on a battery getting maximum charging possible.

The issue is the alternator or the way it is connected.

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