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battery and brake light on????????

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Old 08-09-2005, 05:00 PM
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battery and brake light on????????
any suggestions why my battery and brake light would be on? the alternator is good, battery is good as well as the fuse. the battery is holding a charge and the alternator is doing its job, its not overcharging. and i figure its not under charging because the battery is at 12v


if anyone has any knowledge on this subject please let me know, i've been rubbing my head for 2 days now.


thanx
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Old 08-09-2005, 05:01 PM
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Originally Posted by JDM_Maxima
any suggestions why my battery and brake light would be on? the alternator is good, battery is good as well as the fuse. the battery is holding a charge and the alternator is doing its job, its not overcharging. and i figure its not under charging because the battery is at 12v


if anyone has any knowledge on this subject please let me know, i've been rubbing my head for 2 days now.


thanx
Check your brake fluid level
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Old 08-09-2005, 05:07 PM
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Weak alternator? Get both alternator and battery tested at an auto store (some do it for free)
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Old 08-09-2005, 05:45 PM
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i just experienced this and the stickies say its your alternator. replaced both and now i am having new problems, but if i figure em out i will let you know just in case you do too.
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Old 08-09-2005, 06:13 PM
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bye bye alternator
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Old 02-12-2006, 08:58 PM
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lol so thats what those lights mean? it did it once weeks ago, hasnt came back since, expcept tonight

why would nissan make the brake light come up in conjunction with the battery light to signal a bad alternator?
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Old 02-13-2006, 01:25 PM
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Most likely the alternator, but you can have it tested for free at wal-mart.
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Old 02-13-2006, 03:52 PM
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Your battery should be around 13.5-14 volts with the car on. If it's only at 12v then your alternator is junk. And as for the brake light being on too, it's just how Nissan designed the electrical system.
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Old 02-13-2006, 04:05 PM
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My wife's maxima did the same thing last week Tuesday. She was able to drive it about 5 miles, then the car died. Brake and battery light is Nissan's way of saying you need a new alternator.

I replaced the alternator and all is fine now. Good idea to check your belts and also the tensioner at the same time when you replace the alternator.
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Old 02-18-2006, 02:16 PM
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If you're getting the brake and battery lights it means your car is receiving less than 12 volts. As mentioned above your alternator should be putting out more then 12 volts to keep everything charged. Sounds like time for a new alternator.
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Old 02-19-2006, 11:01 PM
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Originally Posted by bhmax16
Your battery should be around 13.5-14 volts with the car on. If it's only at 12v then your alternator is junk. And as for the brake light being on too, it's just how Nissan designed the electrical system.
Hey so what if just your BRAKE light is on? Mine's come on recently, but no battery light or anything.
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Old 02-20-2006, 07:26 PM
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check your brake fluid reservoir&emergency brake switch
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