Long story short I work doing a side job for my boss in his F-150. it consists of installing a double din deck with GPS and all the goodies. the GPS needs to be connected to reverse switch and speed gear output/ input. where can i find these wires and what are the colours to look for. its a 2006-08 f150 crew cab FX4. I work with police car electronics all day so I know what Im doing. but ford only gives use the wire colours for what were tapping into not the whole car. Preferably I want to tap in as close to the center console so gauge cloister I'm sure ican find the reverse switch in by the Auto shifter its just not sure which wire it is and I have no clue where to find the speed sensor.

 

from this:

http://www.discountcarstereo.com/pdf/frd04-aux.pdf

you can tap the vehicle speed in the pin 14 of the can bus that goes to the radio (page 3)...

 

I was going to ask this very question I am getting ready to install a Pioneer Avic D1 head unit into my F150. Thanks for the link.