How do I reset a computer on a 2004 chrysler sebring

There is no horn relay..

There is no such thing as a transmission reset

Try unconnect battery for 10 min and reconnect.
Try unlock door, lock door, unlock door, lock door, unlock door. Try starting car.

whats abs doing abs stands for anti brakeing system if light stays on system has detected a error in brake system error needs fixing then it can be reset

Sounds as though you have blown a fuse check yourhandbook for fuse location and which fuse covers the three items replace any blown fuses with the same value ie:15 amp with 15 amp 20with 20 and so on

Apparently. . .

The computer should reset itself if you unhook the battery for 30-60 minutes, if not you will have to take it somewhere to clear the codes. Try what I said first, it should do the trick.
Hope that helps you.
Larry

PCM data configuration error you can pick up an OBD reader from most pats stors for about 50 dollars and reset it but if it continues to come back on you may have to replace the computer (PCM)

I had a similar issue with my Sebring. I took it to the dealership and they just "rebooted" my computer system. They said the computer was getting confused and having problems downshifting. I would check with them. It only took a few minutes at the dealership to reset it. I was relieved that it wasn't something major!
Hope this helps.

-LH