I changed my battery today and now the stereo isn't working. It doesn't turn on at all. It's as if there's no power. I have no idea what the security measures are so I don't know what's going on. I've tried the obvious stuff like check arial and other connections.

I don't know of any codes.. Any ideas?

Cheer, guys.

You checked the fuse dude????

Sounds to me like you need to input a security code having had the battery disconnected - I have to input a four figure code whenever my battery is reconnected.......

The fuse is fine.

I'm thinking a code too but it doesn't ask for one. And I have no idea what it is.

did u check the fuse on the back of the head unit or in the main fuse box?

If its the original Clarion Finish Line job then yes, it needs a code.
Try looking in the handbook or something, sometimes the ex-owners write them somewhere.

ooh i got a sapre set of key codes, after all i ended up with 3 full folders from these cars!