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Alternator light is on - 1997 Mazda Protege

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Check batter voltage with car running. If it is around 12.8 or lower, change the alternator. Go to Advanced Auto Parts or another chain and they will check for free.

Posted on Apr 18, 2013


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After replacing the alternator airbag light and battery light stays both lights go off and car dies.

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Battery Light Due to Damaged Alternator Connector on Ford Crown Victoria ... how can i turn off the airbag light on a 1991 crown victoria made by ford ... the battery light onreplace alt and batt light still what else can it be? thaqk. it sat for two weeks when we had snow i used my truck staqrted car light comes on and stays on.

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Dec 27, 2015 | Cars & Trucks

1 Answer

Battery charging system light is on but system is charging

have the alternator bench tested as it may have a faulty rectifier pack in it
charge lights basically work by when not running the current flows from the battery to the alternator through the light
when the alternator starts to charge it puts a reverse current back through the light in opposition to the battery and so the light goes out
if the light stays on then that means that the current from the alternator is alternating and the battery is keeping it on.

Jun 08, 2015 | Cars & Trucks

1 Answer

94 cressida alt wiring/light

does the light come on when the key is turned to the RUN position ???
yes, good
no, not good
light is powered from the key, to the bulb then it grounds through the alternator when the alternator excites... that's what the light it, it's the exciting circuit, or it's how the alternator turns on. light not working, alternator not turning on...
have you tested and made sure you have power on the main alternator wire from the battery ???
do you own a test light and/or DVOM ???

Oct 25, 2014 | Toyota Cressida Cars & Trucks

1 Answer

Battery light is on starter and alternator are working

first,what kind of car? second,how do you know the alternator is working?let me tell you how the alternator and the battery light works. the bulb receives ground from the alternator when the alternator either isnt spinning or if the alternator is defective,so when the alternator is spinning and said alternator is in working condition, the alternator sends power to the bulb,and with no ground,the light goes out, so,to answer your question, install a reman or new alternator because your is bad.

Aug 11, 2014 | Cars & Trucks

1 Answer

Alternator light stays

Did you have the old alternator tested before you replaced it ?
The light stays on if the alternator is not putting out enough voltage to reverse the flow of current thru the warning light. The problem could be the light circuit, or the alternator may not be charging.

May 30, 2013 | 2004 Toyota Highlander

1 Answer

Battery died....replaced battery, kept loosing charge....replaced alternator....I am get a reading from the alternator and from the battery, but the alternator is not charging the battery.....what do I...

have alternator checked at auto parts store. I bought an alternator at P.B.'s
auto parts after the second one was bad had next two tested yep had four bad alternators right off the self fifth one was good. if alternator is good look for pinched wire or wire grounded on cars frame causing a constant drain on battery
or small light not shutting off like glove box light, light down by foot, light under hood or back up light staying on.

Sep 20, 2011 | 1996 GMC Safari

2 Answers

What would be the reason my battery light and check engine light is on?


Sep 20, 2011 | 2005 Dodge Stratus

1 Answer

Will the oil light brake light and battery light go off when i replace the alternator

just the battery light will go out when you replace the alternator, that is, when the car is running. It is normal for the battery light to be on when the ignition is on but the engine is not turning the alternator (running).

The oil light and brake light are different than the alternator circuit.

Jul 05, 2010 | Cars & Trucks

2 Answers

Replaced battery, light is still on

The battery light is usually an indication that the battery is not charging. This could mean your alternator is bad but sure to check the alternator belt tension carefully. If it is loose, it can make the alternator appear bad.

Jan 24, 2010 | 2004 Mazda RX-8

2 Answers

Alternator light on all the time

The light tells you that the alternator valotage is too low. It should be a little higher (14 - 18) than the battery voltage 12-14.The alternator has worn brushes. Replace them or swap for a reconditioned alternator ($80-120)

Dec 17, 2009 | 1999 Volkswagen Passat

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