I am trying to install the D-3 on my 2002 F-150 and it's saying something about a reverse gear indicator or something like that. Where would I find a wire to tap on for this? I have looked in the F-150 manual and haven't found any actual wire that is supposed to do anything about that. As far as the manual for the D-3 it says to attach it.

The wire for the reverse lights of your vehicle

Check my post on the Ford Forum. It shows where I found it on my explorer. This may help you, I'm not familiar with your truck but the location and color may be the same for you.

http://www.explorerforum.com/forums/sho ... p?t=215191