Reinstalled radio, now it doesn't work
 

Up until a few weeks ago, I had an aftermarket HU in my 01 Civic, with amp and subs, installed by Circuit City.

Being the adventurous type I am, I took out the HU and put in a touchscreen monitor for a carpc that I installed myself. Everything seem fine enough, though a few things stopped working; there was no warning beep when the lights were left on when the ignition cut off, also no beeping for keys in the ignition, the overhead light wouldn't come on when the door was opened, the power locks wouldn't work unless the ignition was on.

I've now decided that the carpc wasn't doing it for me anymore, and I'm going back to a regular HU. So I put everything back to the way it was before (the way CC did it) and now the radio nor my amp come on. I tried just the stock HU (straight radio to car harness,) but that wouldn't power on either. If I had to guess, I would say that there's no power coming thru the wire harness from the car. I don't own a multimeter, so I haven't tested anything yet, but I will borrow one from work tomorrow.

Anyone have any ideas on troubleshooting this?

Currently, the amp switch is spliced into the power antenna line (according to the Metra wire harness). When I had the carpc, I had the amp switch to the 12v acc line, the speakers to their respective lines, and then all the other lines just taped off. This was working just hours before I switched back to a radio.

If I'm not getting power from the car to the radio, is there an easy way around this? Or should I just take the car to a pro shop and get them to fix it?

Thanks in advance.

P.S. Anyone interested in a used carpc? lol

Re: Reinstalled radio, now it doesn't work
 

"back up" fuse in under hood box.

Re: Reinstalled radio, now it doesn't work
 

You need the radio code. It should be on a card that came with your car's paperwork. Some of them are under the hood on the decal that's right in front of the radio. More still have them on the decal inside the door. If you don't have it in any of those places, your dealer can get it for you.

Re: Reinstalled radio, now it doesn't work
 

That did the trick, thanks!

I wasn't even aware of that fuse box. Next time I think I'll let someone else do the install... too many headaches, though a good lesson in car electronics.