Battery light on

2003 NISSAN ALTIMA
160,000 MILES • 4 CYL • 2WD • AUTOMATIC
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EXTERMINATOR
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  • 2 POSTS
Battery light came on mechanic said alternator making noise car was bad. bought rebuilt alternator put in needed jump battery light still on next day returning core asked for battery check. Battery running hot at 15.3 to 15.5 was told alternator not shutting off.
Bought another tested rebuilt alternator that also needed jump with same results. This car does have a aftermarket remote starter. Tried second battery before buying second alternator. Does have and replaced a aftermarket battery clamp and fuse. A friend told me to go to Nissan and buy the correct battery clamp and go on from there.
Battery light still on.
Mar 31, 2019 at 7:20 PM
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SCGRANTURISMO
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  • 4,897 POSTS
Hello,

This has got to be a problem with the voltage regulator, but the voltage regulator is an integral part of the alternator itself. Can you please double check the wiring and make sure that it is hooked up correctly? I have included a link for you to go to down below.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

I have also included information on your vehicle's alternator operating system, exploded diagram, connections, and a wiring diagram in the diagrams down below. Please use the information, go through the guides, and double check the connections, and get back to us with what you find out.

Thanks,
Alex
2CarPros
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Apr 1, 2019 at 8:01 PM
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EXTERMINATOR
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Disconnected after market remote starter put on factory battery terminal end, with same results. battery light still on.
Apr 2, 2019 at 12:38 PM (Merged)
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JOETECHPRO
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Hey EXTERMINATOR,

Can you please check the battery voltage with the engine running and let me know what you have?

Guide below to check if your alternator is charging:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

If it is charging then i can run you through the check for the charge warning light.

The charge warning light is operated by a feed from the alternator.

You can also check the connections on your alternator to ensure there is not a loose connection. There should be a 2 pin plug, the brown/yellow wire goes from the alternator to your charge warning light.

Please also check fuse 14 in the interior fuse box. Guide to check fuses below:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

location shown below.

Regards, Joe
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Apr 2, 2019 at 12:38 PM (Merged)