I have a 2004 Ford F150 Supercrew and I was needing to know where and to which wire I need to connect it to?

Parking Brake wire is the lt. green/red wire at the parking brake switch (just follow where your pedal goes to and you should see it).

Just curious though, you're not bypassing it?

If you are bypassing, just ground the parking brake wire coming off the AVIC, don't connect it to your vehicle.

How would i ground the parking brake wire with the connector on the end of the parking brake wire?

you cut it off

I have the parking wire connected to the parking brake could this be why even when i have the parking brake engaged almost all the icons are grayed out?