I recently bought an after-market touch-screen radio from Amazon and tried to install it myself. When I installed it, I foolishly plugged in the power chassis cable wrong and saw a spark in the radio. Then I tried to put back the old radio and discovered it wasn't working as well, did some research and found that the fuse for the radio was under the hood, labeled as "29 - BACKUP", diagram:

I ordered a new radio, replaced fuse 29 with the appropriate 10A mini fuse, once I plug in the new fuse I see a spark and the fuse blows again. Did it one more time because in my head maybe the replacement was faulty and the other fuse blew up.
Remote fob does not lock/unlock anymore either.
What have I done wrong? Has anyone else experienced this issue? I'm at the end of my rope here trying to figure this out.

 

There is a short in the circuit. Unplug the gray 24-P connector at audio unit and check the white colored power wire at terminal no. 3.

 

Thanks for the reply, I checked the wire and do not see anything that would be causing a short. It must be another wire.. I replaced the fuse and disconnected the 24-P connector, the info screen at the top turned on..
I don't get it, this is the 2nd radio I ordered..