What happened here...help please.

A turbo timer installation was tried on my brother's 2k GSR. Everything was wired correctly per say GReddy's direction to the correct wires of the ignition wires. After installation, I turned the key to the position where the lights should light up, but nothing came on. It seems like everything is dead, the radio doesn't work with the key in the on position. The alarm doesn't work either. He has a Viper alarm. What went wrong? I'm confused and lost.

Did you reconnect the battery.

Did you put the battery in the correct way cuz if you install it in opposite directions you will blow you fuses.

Use another battery from another car and see if it starts, if not then check all your fuses (all of them)

Tell me if this worked.

jungliss23 is right, that happened to me too... if you ever short any wires you blow up some of the fuses and that'll make your lights not work among other things. Just pop em open and you can look if any of them are burnt... easy enough to replace