New CD player. KD-AR390/KD-G340

You can download the manual here.

It might be a good idea to check all of the fuses in the car. The radio requires two power sources in order to work properly.

your ac-dc converter is not properly shielded or grounded, you need to replace it with a good one.(or you may wire you cd player chassis to a grounding receptacle, most ac outlets the center plugs are the ground terminals)

some car cd-player has a memory circuit, that will remembers on what state it was before power was remove, like yours it will play again as soon power is applied to it..

When your car set stops and displays e-3 this usually is a sign that the disc which is being played is either corrupt or has scratches on it.
Also the e-3 could also be an indicator that the disc lens for the unit has gotten dirty and is due for some cleaning.
All you have to do is get a disc cleaning kit and run it on the car cd receiver to clean up the dust in the unit.Once you can get this done the unit should begin to function perfectly.
Hope this solution has been helpful?

Here is the manual for your radio.
http://resources.jvc.com/Resources/00/01/13/GET0487-001A.pdf

check the wires in the back of the stereo if not then make sure the back speakers are not hooked up to a internal amp and if it is make sure that it is not blown

you stop being lazy and open your manual or google seach or the pdf manual if you dont have it anymore like seriouslly man the time you spend finding this site and whining about a fake problem and waiting for a answer you could set 100 different clocks probally built your own.

Do not cut the wires from the car. Instead, call Crutchfield at 888-955-6000 and order the adapter part number 120701003. When you call them, ask for color coding. For JVC, refer to the attached picture. Match the adapter color code with that of JVC. If the adapter color code is the same, then connect ground (black), battery (yellow), and wire from ignition switch (red) securely. Turn on the car and see the radio works. If it works, connect one by one speakers and confirm. Remember, perfect connection gives reliable installation.

If it is a "Ready for BlueTooth" model you will need this adapter JVC KS-BTA20

Try rewiring it. Yellow to a full time hot 12v and red to an ignition switched 12v