I second surlyns post, I am scared to do ANYTHING electrical, and I got a t-one connector from drawtite for about 40, the 2inch hitch (drawtite was about 165) and all you do is unplug one wire snap in the connector, and plug the wire into the connector.
Than done. Super easy took 30 minutes, including tucking all the wires, and reading the instructions 7 times (they where very clear, but i am a chicken)
It took about 1 hour to mount the hitch....