The cables that work the lower rear door latches on a Supercab like my 2002, tend to fail. What happens is that the rubber end on the cable housing breaks and can't hold the cable housing place so the cable will actually pull the latch. I repaired mine before using new factoy cables included with a new latch. Cost over $200. They failed again and this time I had found out about the aluminum cable housing ends you can buy for cheap to replace the broken rubber ones. Fixed both doors this time for $10 or so, maybe less and I think they will last this time.

This video will give you a good idea what to do.

https://www.youtube.com/watch?v=HGcJ...ature=youtu.be