I turn key but car won't make a sound

Battery cables dirty or loose or bad battery.

Have you lost the chip out of the key?? try the spare key before you go any further

sounds like the rke module (Remote Keyless Entry) module losing power, I hope that helps you out

any real answer yet? did the problem ever get resolved? i have the same problem with my sister's car. too cold to diagnose tonight, but will post the solution probably tomorrow. since the lights and heater works, but ignition and radio arent getting power, my first guess is there's probably a fried fusible link which controls the 2nd accessory power to the ignition switch. will post a solution soon.

What year is the vehicle ?

check your ground wire from battery to fram take it off at frame and clean the frame then put wires back on this is a common prob with honda accords

Hello,

was the radio and interior light working before you removed the fuse for the horn? In the process of removing the fuse for the horn, you must have mistakenly tempered with the fuse for the radio and interior light.

So I would suggest you go back to the fuse box and deep them in properly because the interior and radio fuse might not be contacting properly.

I hope this makes sense to you.

Good luck.

you may be out of gas or have a bad fuel pump

fuse is blown

There is a switch either in or on the driver door that turns on the interior lights and tells the module the door is open and the key is still in the ignition, this sounds the alarm, check all the doors and make sure they turn the interior lights on and off when the doors are opened and closed.