I have a 1997 Eddie Bauer XLT. I have a lincoln navigator door key pad handle that I got from the junkyard. I cut all the wire I believe I need. The only thing I think I may have for gotten was a computer chip or a fuse of etc.. Has anyone ever tried this before and if so what is my next step to install it. I know I'm going to need to tap into the wiring, but what else will I need to do? Thank you