Question about 1999 BMW 323 Series

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Battery blinking 3 days ago the battery light in my car started blinking, not in a regular pattern, just on and of in the beginning and stays on a little longer now, like 2 seconds. What cant that be?

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Hello!
Tighten the electrical connections on the alternator. Check to see if the alternator is good, although in rare cases a poor internal connection on the alternator can cause this, The cable that runs from your alternator to your battery ( EITHER END OF IT ) could be mostly broken...not all the way...just hanging by a few threads. Tighten your battery cables. Your car's 10 years old, check for a good ground connection from the battery at the frame of the car ( no rust ). Good Luck!

barneyluc

Posted on Oct 08, 2008

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If the battery does not have enough juice to start the car then the first thing you have to do is completely recharge the battery. This will take at least 6 hours, over-night on a self-regulating charger is the best.
At the end of the recharge the amps going into the battery should be under .75A High amperage when fully recharged is an indicator of poor battery condition and it's time for replacement. This is also very dependant on the charging equipment too. Some aren't very good and some are great at regulating charge rate when the battery is fully charged.
Then you check the voltage once it's been setting for at least 4 hours with the charger off. ~12.3V minimum. This also depends on battery type. Serviceable cells are lower whereas the sealed cells will be a bit higher.
Install the battery then start the car. Voltage should be at it's highest point about a minute after the car is first started and the engine is running at 1500 rpms. ~14.4V
Next turn on all the electrical accessories, headlights, A/C on max, brake lights and check the voltage should still be ~14.4V
As the battery is recharged, after about 15 minutes of high way driving the voltage will drop. This is caused by the battery reaching it's stable state and temperature, hotter=lower voltage. The voltage should stay above 13.0V under load as the bottom end of service.
To check the MEGA fuse connection see what the voltage is on both sides of it. The + battery terminal, starter cable end, megafuse both sides and alternator rear bolt should all be within 0.1V of each other. If the voltage is lower there is a connection that is not 100%. This will worsen with load. Also the major ground points should read less than 0.5 ohm between the - battery terminal and the starter and the smaller ground near the air cleaner box on the fender.
When idling with a full load the voltage should still stay above 12V. The alternator is not capable of good output until at least 1200 rpm engine speed. As an alternator ages the peak voltage seen will slowly drop. A new regulator with new brushes will usually fix things. If the bearings are bad it toast and needs to be rebuilt or exchanged. But the regulator/brush thing is a breeze to do on the work bench.

Posted on Oct 08, 2008

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Have you checked if the battery is fully charged? If it is, it could just be a case of loose wiring. The mechanic should be able to identify and repair this for a low cost. Nothing serious.

Posted on Oct 08, 2008

4 Suggested Answers

ilragatzzo78
  • 241 Answers

SOURCE: Blinking battery light 99 323i

ehiter your battery is dying, or your alternatos is slipping.
try checking the tension on your belt, if is kinda loose maybe that's your problem.
if it's ok, then it may be your battery.

Posted on May 24, 2008

BeamerGuy
  • 28 Answers

SOURCE: battery light blinking

The battery light shining means that your battery is not charging while you are driving, The light blinking means that the altenator(Component that Charges the battery) is faulty, It couls also be a sliping belt since the altenator is drivin by a V belt, Check the belt tensioner and if the problem persist have the altenator checked out.

Posted on Oct 13, 2008

BeamerGuy
  • 28 Answers

SOURCE: battery light

If the battery light is on while you are driving it means that the battery is not charging, The altenator(Component that charges the battery) might be faulty or it could be a sliping V - Belt since the altenator is drivin by a belt that runs from the crankshaft, the V-Belts also drive the Aircon and Power steering so make sure you check the tensioner for the altenator and if the problem persists have it checked.

Posted on Oct 13, 2008

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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If the battery light is on while you are driving it means that the battery is not charging, The altenator(Component that charges the battery) might be faulty or it could be a sliping V - Belt since the altenator is drivin by a belt that runs from the crankshaft, the V-Belts also drive the Aircon and Power steering so make sure you check the tensioner for the altenator and if the problem persists have it checked.

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Blinking battery light 99 323i


ehiter your battery is dying, or your alternatos is slipping.
try checking the tension on your belt, if is kinda loose maybe that's your problem.
if it's ok, then it may be your battery.

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