Radio Install Help? Radio and Dome light do not work

Went to go install an aftermarket pioneer deck into my stock 2003 tacoma regular cab. Had the factory radio in it, and it had never been changed before. I took it all apart, and first wanted to test the new deck to make sure i had all the connections right. I got all my install stuff from crutchfield and i had to the proper diagrams and wires connected.

I twisted to wires together for the test run, hooked up the battery, new radio turns on, but every time i hit a button on it, it just powers off.

+ and - wires touched together, i hear a zap. I break it all down, now factory radio and dome light both don't work.

I need some help... suggestions?

 

it is either (a) a band ground issue or (b) more than likely a bad fuse. A bad fuse means no accessory power but the fuse probably didn't pop all the way and is getting a very tiny power arc in the fuse. That's why it turns on but dies as soon as you press a button. This can cause major damage to your electrical. Find and replace fuse and double check you have a solid ground. Both should be fixed. It either your 'radio' fuse or 'accessory' fuse or both

 

turns out it was the 15 amp dome fuse under the hood, thanks for the help