Question about 2002 BMW 5 Series

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2002 x5 battery going dead it is a new battery and I checked the alternator

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  • gord storey
    gord storey May 11, 2010

    Battery dies while parked , or while driving ? Also , sometimes new battery can be a dud. How many Volts while running ?

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  • BMW Master
  • 14,036 Answers

CHECK ALTERNATOR OUT PUT IT SHOULD BE 13.5 TO 14.5 VOLTS WITH CAR RUNNING.CHECK ALTERNATOR WIRES AND FUSE.ALSO HAVE THE BMW DEALERSHIP SCAN YOUR CAR BECAUSE ALTERNATOR IS PCM CONTROLLED.

Posted on Nov 13, 2009

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BMW X5 battery light flashes. Is it the battery or alternator?


Think what your asking

You have the car & we are on the internet !!!

If the battery is 5 years old-- it may have failed
You could test it & then if necessary replace

The alternator has nothing to do with starting & that
also can be checked for voltage & current output,
but not from where we are here at our homes,need
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Car has a new battery and alternator and now it will not start at first it clicks after a while it will not do anything. any ideas as to what is going on with our 2002 dodge intrepid


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I have a dodge caravan 2002 it wont charge put on new alternator, and computer. it still wont charge. the wire on the back of the alternator is not showing any fire?


Why do you feel it isn't charging. Are you going off of a voltage ereadiing? I ask because if it is reading 12 v at the battery , Do not run it very long. The lower the voltage the higher the amps. An Alternator will ocweheat and self destruct if it is working at its high limit for 15 minutes or so. A heavy charge iis normal for 30 seconds or so to make up for the starting drain. But, should show a gradual rise within seconds. An alternator is for battery charge maintenance only and should never be used to charge a dead battery. A dead battery can an will over tax the alternator for too long. A defective battery will do the same thing and it is usually why you have to change the alternator in the first place. So, If your battery is dead or extremely lpw, it should be charged with a charger Do not put a new or rebuilt Aly. sgainst a possible bad battery. It costs nothing to have your batt load tested by a auto parts store. Good Luck=Ned-.

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1 Answer

I remplace a new alternator and battery on a BMW x5 2001 it won'


theres an anti-theft system. take positive terminal off battery, have someone holding the key on like trying to start it, then put the terminal back on and that should start it right up (had same problem in my dodge ram) if not, check all you're connections

Aug 16, 2009 | 2001 BMW 5 Series

1 Answer

Is it the alternator?


check the alternator it is probobly bad , because the aleternator charges the battery,, when it quites working you only have the battery to run on for awhile then it will go dead because the alternator is no longer charging the battery as a rule of thumb check the voltage on the battery with a voltmeter positive on positive negative on negative if its unnder 12 volts alternators bad hope this helps

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Electricall problem w/2002 V6 mazda tribute


When that light comes on, it is indicating charging system problem which could mean alternator not charging for one reason or another like loose belt, faulty alternator, or yes, bad battery or connection at battery, for example. First & easiest thing to do is check all your connections to battery, which you've probably done, and make sure they're tight & clean. Make sure belt driving alternator is good & tight, and in good shape. Now boost the vehicle to get it going & test voltage at battery, after you take cables off. My guess is in your case, the voltage will begin to go down, indicating a bad alternator, that will need to be replaced.

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1 Answer

Something is draining the battery; alternator checks ok; new batt


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