I bought a used 2006 Eddie Bauer Expedition, with Rear DVD and no factory nav. it came with a Avic D3 installed, I had been having problems with it and upon removal it appears that whoever did the install did a very poor job and there are several loose wires that look like they were connected at one time but are no longer. I guess I am looking for 2 things, which wire is the VSS and which is for the reverse signal on the factory harness and if I am not installing a camera, do i even need to worry about the reverse one?

Thanks in Advance.

I guess I am looking for 2 things, which wire is the VSS and which is for the reverse signal on the factory harness

those wires are probably not at the factory harness if the factory radio was non-nav

and if I am not installing a camera, do i even need to worry about the reverse one?

No

My 2008 F-150 had a vss sensor wire up to the factory radio since it had speed volume control.

then he may have luck if his radio had that option