Replaced alternator and brake/battery lights still on - Nissan Forums : Nissan Forum
 
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#1 Old 02-17-2005, 07:51 PM
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Replaced alternator and brake/battery lights still on

Hello everyone after doing a search I found that when the battery light and brake light come on at the same time that the alternator is about to go. Well I replaced it with an OEM alt. and turned on the car and both lights still came on. What else could be causing this? Any help would be appreciated.

FYI
It's a 1996 Altima
I don't have a system
The brake fluid level is fine.

Thanks
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#2 Old 02-17-2005, 07:56 PM
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possibly a relay; also check fuses and connections to your battery.

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#3 Old 02-18-2005, 10:25 PM
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Has this happened to anyone else after replacing the alternator. The brake and battery light staying on, I mean.
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#4 Old 02-18-2005, 10:28 PM
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Yes, meaning the alternator is still bad (the new one you got).

Was the new one rebuilt? If so my guess its that. Happened to me. I dont know what else it could be.
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#5 Old 02-18-2005, 10:33 PM
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would resetting the ECU help?
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#6 Old 02-18-2005, 10:42 PM
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Quote:
Originally Posted by coach
would resetting the ECU help?
No, because the ECU does not play any part in the circuit.

If the battery/brake light is still ON then the "new" alternator must be bad or has gone bad.



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Last edited by jserrano; 02-28-2005 at 06:19 PM. Reason: Typos
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#7 Old 02-18-2005, 11:04 PM
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There's probably an extremely good chance it's bad if it came from:
1. Autozone
2. Advance
Any other chain store that sells similar quality electric crap...

I've always heard NAPA, CarQuest, O'Reilly's(suprising) have decent alts/starters, etc, depending on the area...

And if the store offers a Lifetime warranty, usually there's a good chance you'll be replacing it for a lifetime...

Jeremy
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#8 Old 02-18-2005, 11:15 PM
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Have you tried a volt meter on battery? Check volts before starting then after its started you should see an increase in volts to around 14.5 if alternator is good.
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#9 Old 02-19-2005, 01:12 AM
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Batt and brake light on when the car is running is Alternator ... or you have a short to ground on the wire ...

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#10 Old 02-19-2005, 09:47 PM
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I got the alternator from a Nissan dealership. And I tried resetting the ecu. On the short to ground on the wire do you mean the wire coming from the alternator, I'm guessing the wire that screws into the back using a small phillips head screw is the ground wire. It would definately suck if the new alternator is bad especially since it came from the dealership.

Thanks for the replies. I should have known it wasn't going to work since I didn't have a very hard time replacing it. If you guys have any more ideas please post.
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#11 Old 02-19-2005, 11:23 PM
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you should have some type of warranty from the dealership on new parts if they are DOA. just take it back and get a new one
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#12 Old 02-28-2005, 03:26 AM
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Can anyone enlighten me on what ground wire I should be looking for? Or should I add an additional ground? Thanks
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