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Discussion Starter #1
Headlights dimming (going from low to high(good) strength)


Is this an alternator issue? It's not the bulb or the connection. THe battery light in the dash comes on and off as well. I can also hear it on my radio (the low whiney sound I get when I have my phone as an MP3 player "pulses" together with the dimming).

I had the battery checked and they say it's fine. With the engine off the headlight stays on fine.

Any input is appreciated!

Thanks!

03 EX Automatic
 

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BRWNFLSH now
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7,453 Posts
Got multimeter? Check voltage with engine running, should be around 14v (alternator charging). Check for loose/corroded cables too.
 

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That looks like a alternator problem, but as BLCKFLSH said check the battery cables and make sure those connections are clean and tight. Check the ground connections from the body to the engine as well. Look at the fuse block under the hood and make sure that connection from the battery is tight. Of that all checks out, you could have the alternator tested off the car.
 
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