[scottfab]

Ok first goal is to find the source of noise not to install.
Therefore tie all three harness grounds together and ground
to the chassis ground of the box under the glove box.
Make the other front and rear audio connections without the ant.
Next tie the two power wires together (switched and constant on) and leave the ant power wire disconnected. Now take those two that are tied together and run them
straight to the battery hot side.
Check for noise using iPod or USB not radio.

NOTE this wiring will cause the radio to be on all the time. That's fine remember we're just testing.

If you still hear the noise try running a groud directly from the chassis on you new radio to ground.