I made an entire walk through video fixing the door latches on my 2002 Ford F-150. The struggles and everything I learned included.
I opted to not make something but use a ready made product. These are the ones I used: http://forddoorlatchcablerepairkit.com


Check it out if you want a video walk though.

 

Great tips here guys, just what I need for my beast, as both rear door cables , and main side door have died. So I need 6 pairs of those shipped to me here in Holland. But the fix using bike adjusters is brilliant - as there are thousands of bike fixers here :-)
Thanks, Karl

 

Check aseparts, inc. or cherryboy.t on ebay ships these all over the world.