Radio won't power n 2003 Nissanaltima - 2003 Nissan Altima

Ok, those systems might still work because the not require as much energy as the starter. Check the Battery Voltage with a good Voltmeter. If below 12, there might be your problem!

Are you saying the engine cranks but won't start, or the engine won't crank ?
If the engine does not crank, you would check for voltage at the starter, the neutral safety switch, and the key switch as well as the ground connections.

go to www.reliable-store.com you will get all info and
solutions there definitely

try to replace it with a different CD player

For Radio related problem,the help links are below.Click the link below to go through its procedure:-----Car radio works but CD player not working? http://technoanswers.blogspot.in/2012/02/car-radio-works-but-cd-player-not.html-----------How to reset Radio code after car battery is died?

http://howtobyme.blogspot.com/2011/12/how-to-reset-radio-code-after-car.html

------------- Can car radio code block Passkey anti theft system ?

http://schematicsdiagram.blogspot.com/2011/12/can-car-radio-code-block-passkey-anti.html

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How to wire new car Radio?

http://schematicsdiagram.blogspot.com/2011/12/how-to-wire-new-radio-on-1990-toyota.html

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Radio Stereo Wiring Diagram?

http://schematicsdiagram.blogspot.com/2011/12/radio-stereo-wiring-diagram-for-1991.html

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How to remove radio on Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-radio-on-acura-car-models.html

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Where is Radio Fuse located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radio-fuse-located-on-2007.html

----------- After Market Stereo wiring?

http://schematicsdiagram.blogspot.com/2011/12/after-market-stereo-wiring-for-1999.html

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car radio doesn't allow to switch to the XM Band to get the radio ID?

http://schematicsdiagram.blogspot.com/2012/01/chevy-car-radio-doesnt-allow-to-switch.html

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No power to radio Scion Xb?

http://repairhelpcenter.blogspot.com/2012/01/no-power-to-radio-on-2005-toyota-scion.html

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Radio has power but no sound?

http://repairhelpcenter.blogspot.com/2012/01/lexus-rx330-radio-has-power-but-no.html

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Radio goes ON and OFF while driving?

http://technoanswers.blogspot.com/2012/01/radio-goes-on-and-off-while-driving.html

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Town Car Radio stereo wiring?

http://technoanswers.blogspot.in/2012/02/lincoln-town-car-radio-stereo-wiring.html

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Radio wiring diagram for Car?

http://technoanswers.blogspot.in/2012/02/radio-wiring-diagram-for-1997-lincoln.html

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How to remove cd player from dash?

http://technoanswers.blogspot.in/2012/01/how-to-remove-cd-player-from-dash-on.html

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This will help.

Thanks.

If the passkey is messed up, there will be a light on the dash that says security, or have a picture of a car with a lock thru it. If there is no light when the key is turned forward, then its NOT a passkey problem.

Check the detachable portion of the "faceplate" on the radio. It's where the memory buttons are. That sometimes doesn't get a good connection and the radio won't work.

The radio anti-theft has locked itself out. You need to go to your local agent with ID and they will check your radio serial number and be able to give you the correct unlock code. (Make a note of this for future ocassions).

fuel pump