This forum is FORUM technical support. Your post needs to be in Technical support. IF you have duplicated this post, then that is also not allowed per forum rules. If you made mention in another post, unless someone looks at your past posts no one is going to be able to know. Certainty I am no mind reader. Maybe other folks are.
As to your question?
If you have actually checked the fuse using a VOM and it is good, and there is a CB in the circuit, then you need to check voltage out of the breaker, IF you have voltage there, then move up he circuit to the next logical place, The switch. You need 12VDC into the switch for things to work. I would suspect you have a broken power wire where they feed through the door post to the door. Can be a common source of trouble.