Question about 2003 Ford Taurus

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Battery light came on alternator was bad replaced it with new one also replaced battery light comes on after 3 minutes and engine revs up 2003 ford taurus dohc

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Try replacing your timing belt have it inspected to make sure first though

Posted on Jun 02, 2010

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I have a 2008 Ford F-150 4x4 , 5.4 litre engine and the battery light came on so I had it diagnosed and was told to replace the alternator . It caused multiple trouble codes to come on as well so I...


The signal for charging system goes from the generator to the PCM, then to the instrument panel gauge. If that signal is lost or the PCM is sending a false signal the light will come on. Unfortunately, there is no way to check that without a Ford IDS scanner through a dealer. It may have a bad wire or bad PCM. I have seen loose terminals or broken wires from wiring connector at alternator. I would definitely check there before going to a dealer though.
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(this damages the ecu Disconnected negative terminal and car still ran) check and clean the alternator connections. and check the earths. light can come on if water has gotten into the alternator or the connection has come loose. you don't disconnect the battery when the engine is running as it can shock the ecu alternators have a built in voltage stabilizer but this only works with feed back from the battery no feed back it can convert ac instead of dc and blow up the ecu. it also damage other parts.

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Batterylight on after rev new battery and alternator


who put in the alternator and battery. when you rev up the motor the alternator is push more volts. are the wires all hooked up right. there is a starter relay . but i think a wire is touching or is not hooked up right

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My 04 Ford Focus the battery light keeps coming on & going off, have fitted a new alternator belt but it didn't solve the problem. The battery connections are good. Also the rev counter, speedo & mileage clock keep going haywire when the battery light is on. Do you think it is the alternator? Or is it some other common problem?

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i think it is the alternator because the idiot light is connected to your regulator of your alternator. it is an indication that your alternator is not charging anymore.

tnx 4 using fixya,

drcool

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2003 ford focus. battery light comes on but dimly lite


alternator by thesound of it turn on all electics on dark night if lights get brighter when you rev your engine id change alternator

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