Question about Alfa Romeo 156

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2.5 v6 alfa 156 had a new alternater fitted last week cause it wasn't charging and today the battery light has come on again and its not charging, would it be the alternater again?

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  • butlins218 Feb 07, 2009

    what would make the altenator fail again cause I don't want to put a new one on every week at a cost of £440 ?

  • butlins218 Feb 07, 2009

    It was fitted by a garage so I would presume they tested it

  • butlins218 Feb 07, 2009

    I have noticed all week that when all the lights, hifi, heater etc are on the speedo drops off when i put on wipers or brake or similar

  • butlins218 Feb 07, 2009

    Just checked it and connection is sound

  • butlins218 Feb 08, 2009

    the charge indicater does come on without the engine running and stays on as it did when I had the new alternator fitted. today it was blinking on and off for a few miles then stayed on all the time. I have fully charged the battery now and it still stays on.

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That means that the problem was not the alternator.

To start ensure that you are also using a new battery, the old battery may not hold the charge.

Check all the alternator wirings.

If the car does not charge then the problem is alternator or battery, in this case if you stop the car you should have a flat battery in a short time.

The problem is more likey a power drawing problem. To fix this you may need to have a car electician doing a draw test (reading amps) on wiring to car doors , internal bulb, car stereo etc.
A short in there may cause power absorbtion and drain the battery in few hours.

Posted on Feb 08, 2009

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I'd go to auto parts store and have them check battery and alternator for problems They will usually do this for free! I know Advanced Auto Parts does and they have top of the line testing equipment that can tell if you've got the right alternator, bad alternator, bad battery, bad connections, ect...

Posted on Feb 07, 2009

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It is probably the battery this time its got a dead cell id bet...if you just had a new alt put on thats all it can be is the battery

Posted on Feb 07, 2009

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Hi there, this new alternator may have been rebuilt in a fashion that was not correct to specs. you may have to also, increase the tension level as well. it could be lose, therefore, preventing proper charging when in operation.i would check to see if the belt is slipping first.

Posted on Feb 07, 2009

  • Michael Masters
    Michael Masters Feb 07, 2009

    if you notice slippage within the belt, this is easily fixed by relieving the tension bracket screw slightly and pulling the alternator until the belt becomes tighten around the spindle .

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Check the voltage on alternater while engine is running, should be about 13-14V. Your problem could be the battery terminals have been disturbed, check that both are clean and tight as a bad contact can cause the symptoms you describe. Also check the body ground and engine ground.

Posted on Feb 07, 2009

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Hi there the first thing i would do is check the battery make sure that there is no dead cells and make sure the battery water levels haven't fallen, makes sure the voltage and condition of the battery is checked, then i would make sure the earth strap to the car is secure and rust free and is a good connection to the body of the car ( -side black wire or a silver strap), if this fails the battery wont charge properly, also turn everything off on the car and see if there is big drain on the battery because if something has shorted out u will see the decrease on a volt meter causing the battery to drain overnight it don't help with the cold weather either, also make sure the ground on the alternator is clean secure and rust free ,then check the alternator a good garage can test this for you without replacing it .

thanks hope this helps you

Posted on Feb 07, 2009

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Battery doesnot get charge due to dead alternator or loose serpentine belt. If you in US go to nearest Autozone store and check the battery for volatge and alternator for charge. If both fine check the serpentine belt if it is tight enough
http://www.ehow.com/how_2279100_check-serpentine-belt.html?ref=fuel&utm_source=yahoo&utm_medium=ssp&utm_campaign=yssp_art
If it is fine check the connections of alternator and battery for corrosion. Corrosion can increase the resistance and decrease the electrical current
Please kindly let me know if you need more info
Good Luck

Posted on Feb 07, 2009

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When the ignition is turned on, battery voltage passes down the wire to the alternator to 'excite' the alternator when the engine starts. When the engine starts and the alternator generates a voltage, the light is extinguised by the charging voltage cancelling out the battery voltage coming down the wire. If and when the alternator completetly fails the the light will come back on as there is no cancelling voltage. if the alternator produces a voltage lower than the voltage from the ignition switch then the battery light will glow.
but as the alternater is new as you said.then its definately the wiring issues not giving the proper voltages required to the battery so its not getting charged properly.
It could be that it's charging OK and you've got some kind of electrical load drawing the battery down when the key is off. If a charging system analysis confirms that it is not charging, then you've got to go back to the alternator and start there. Use your multimeter to BE ABSOLUTELY SURE it is putting out 13.8 volts. I seen them put out 12 volts, which will keep the charging light out but not replenish the battery. If that's ok, go over all the wiring with a fire tooth comb. Any corrosion? Any partially broken wires? Is the voltage regulator contained in the battery or is on the fender wall?
Does your charging indicator come on when you turn the key to RUN without starting the engine?


Posted on Feb 07, 2009

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Check your battery ground wire. Make sure it is connected properly and is not loose. At both the battery and the block

Posted on Feb 07, 2009

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A dead cell on your battery would prevent it from being charged AND may cause the Alternator to be over-worked and fail.

Have the battery load tested - not just voltage tested.

The alternator is not to blame here.

Also check for loose cables and worn/cracked cables running from battery to alternator. Power AND ground!!

Thanks for using FixYa - a FixYa rating is appreciated!!

Posted on Feb 07, 2009

  • blueextc3221
    blueextc3221 Feb 07, 2009

    The battery is only there for starting the vehicle - once running, the alternator supplies the power.



    Disconnect the battery once running and see if the problems go away!



    You cannot ASSUME a garage does any extra work than you paid for!



    Have the battery load tested!!

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Better you check the Battery First.
Thanks

Posted on Feb 07, 2009

  • rockfixya
    rockfixya Feb 07, 2009

    than check all the wireing gone through alternator and battery.
    You are going to spend £440 than its better make all small checks first. :)



  • rockfixya
    rockfixya Feb 07, 2009

    it seems a battery problem.
    battery produce low Amps.so, during high load Amps, battery not works properly.
    check out the amps reading of battery.

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Did you have the battery tested?

Posted on Feb 07, 2009

  • Jay Glendenning
    Jay Glendenning Feb 07, 2009

    Have the battery tested. Just because the garage replaced the alternator doesn't mean that they tested the battery. They ,ay have tested to be sure that the alternator was sending a charge to the battery but that doesn't tell you if the battery is taking and/or holding that charge.

    You may also want to check the v-belt .. tightness, possibly replace it if you don't know when it was last replaced


  • Jay Glendenning
    Jay Glendenning Feb 07, 2009

    You need to help us help you before we can really help you diagnose this problem (if need be) further. Get the battery tested as soon as you can and we can move to the next step.

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It can be the alternater.but also can be the battery problem.check out the wiring connections of the battery too.

Posted on Feb 07, 2009

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Hi
yes it is alternator only...replace it ..

Posted on Feb 07, 2009

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