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Old 02-21-2012, 12:05 AM   #1
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Lights dimming?? Why

Every time i press my brake pedal my lights dim for a second, also when i get to 2000 rpm they dim and flash??? Why is this?? Can anyone help???????

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Old 02-21-2012, 10:58 AM   #2
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Old 02-21-2012, 11:01 AM   #3
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What are your volts reading
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Old 02-21-2012, 11:17 AM   #4
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Quote:
Originally Posted by Redsand View Post
What are your volts reading
I'm thinking along the same lines ^^, Alternator output issue.
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Old 02-21-2012, 08:58 PM   #5
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My volts are reading around 14 and are not bouncing around. It is steady
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Old 02-21-2012, 09:07 PM   #6
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Define dim and flash. Do they totally turn off? Your alternator only puts out the amount of current/amps that is needed for the system. Usually there is not much of a load needed in the system so it just puts out a minimal amount of amps. A light is nothing more than a short so when you hit your brakes more amperage is needed and the alternator kicks in for this, but it takes a little time for it to kick in. What you see as a dimming of the headlights is the time between the alternator putting out its normal amperage at the level it is at and the a higher amperage needed when the brakes lights come on.
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Old 02-22-2012, 01:13 PM   #7
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There not flashing, you can tell that it gets dim like its not getting all the voltage when you first hit the brakes they dont go out they just get weak looking
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Old 02-22-2012, 03:15 PM   #8
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Take it to local auto parts store and have them test the alternator. Most will do it for free.
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Old 02-23-2012, 11:35 AM   #9
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Thats just what im gonna do, thanks

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