Car won't start, radio turns on automatically when I try to start the car?

I have a 2004 Ford Freestar and I attempted to wire it for pulling a trailer. Well, I messed something up because now when I try to start the car it clicks like a dead battery.

If that's all that happened I would just assume the battery was dead but the radio turns on too and the lights on the dash go a little buggy…

so I removed all the wires I installed but the problem still persists. Any help would be great!

Disconnect the battery cables. Recharge the battery. Then reconnect the cables. When voltage falls below 9.6 volts, everything goes bonkers.

Good jump might help

You have a very weak battery or a poor battery connection.