Under the driver's side door sill there is a splice that is wrapped in something that looks like hockey tape.
Depending on the cab configuration, this is either towards the front driver's side kick panel ( by the hood latch ) or at the rear, where the wiring runs up the c-pillar.
The door sill plate is held on with 3 spring clips, use a plastic trim tool, or plastic putty knife, if you do not have the trim tool to remove it.
The splice you are looking for is in the bundle of wires that are tapped together shown above.
This is what the splice will look like ( the color can change, depending on the items not working, purple seems to be the most common )
It will take some time to find and check the splice, but it is an easy fix.
This is for a case where the fuses are fine, but there is no power at the connector for the item ( might notice the power mirrors do not work either )
When you fix the splice, use marine heat shrink after soldering in a piece of wire to extend the length of the run ( to provide room for the new splices ), the marine heat shrink has the water proofing gel that will seal the ends of the heat shrink tube, and not let water back into the splice.