Q: Rear doors not opening.

Hi, the door handle mechanisms on most vehicles use metal rods and sometimes cables to connect to the latch assembly. The latch is what actually keeps the door closed. The rods that connect the the latch to the handle are held in place by plastic clips. If a cable is used, plastic is also used to secure. As plastic gets old, is exposed to the elements, and get used thousands of times, it breaks. when this happens the rod falls out of place and then the door will not open. Unfortunately this is quite common. I suggest seeking an inspection from of a technician. Working inside a crowded door with a light and usually a mirror looking through a hole in part of the door to replace a tiny plastic clip can be the ultimate puzzle and sometimes not much fun.