Fixing car radio and this happened?

I was replacing my old stock radio on my ford contour and I touched an orange wire. It sparked for a second then my interior lights stopped working and my keychain door locking thing stopped working too. What could be wrong?

Figure out what fuse blew. You shorted out the wire & blew a fuse. Get a test light & figure out which one

Hopefully all that happened was that a fuse or two blew out, and you can replace them to get everything back to OK, BUT it's possible that some damage to the wiring happened… Start by looking at the fuses and if you continue to replace the radio or do ANY electrical work on a vehicle, remove the positive battery post first!

You blew a fuse. Find it and replace it and all will work again.