Is it possible to replace the car radio?

The only place to get parts is at a junk yard of crashed cars.

I have a 2009 Nissan Altima 2.5S and some body had cut the main harness to the radio now i dont know what color is which please help

it could be a problem with the antenna lead not plugged into the radio or the wire has a break in it or it could be the antenna is faulty....hope this helps......cheers.

Radio on but not working

possible causes are: faulty spark plug, coil not firing or arcing, injector fouled. start with your spark plugs and if replacement is neccessary, replace with ngk or nd spark plugs.

sounds like your carb is getting to much air some where check your hoses

Your factory radio probably has a built in theft deterent system that shuts down the radio when it senses a voltage drop. (ie: if the radio is stolen then the thief cannot use it without a code to turn it back on) check your owners manual or paperwork that came with the car. There should be a code that you enter to turn it back on. If not contact your Nissan dealer and they should be able to help get the code for you. Hope this helps

Since each code is unique to the individual radio, you have two options:

1. Find the card in your owner's manual that has the unlock codes and instructions for unlocking your radio
2. Contact your dealership with your VIN number and proof of ownership. There is often a nominal fee for this service.
   

POSSIBLE ALTERNATOR INTERFERES WITH RADIO

On the left hand side by your left knee, there is a fuse box. Sound like for some reason , you blew a radio fuse. Remove cover, find fuse that sais RADIO and check it.