Any of your exterior lights that look like this:
they may have a switch on the fixture.
This switch needs to be ON for the interior switch to work.
They generally are not wired like a residential three-way.
Exterior lights that look like this:
are most likely controlled by an interior switch only.
Some or all of the exterior lights may also be on the remote control if you
have one. Mine are not, but others do have them on the remote.
Other things to check:
Blown 12vdc fuse. None of these lights are on a fuse by themselves so
you should have other stuff not working if there is a blown fuse. Also,
the red light next to the fuse on the fuse panel will be lit if the fuse is out.
Blown light bulb. You'll have to pull the cover on the fixture to check this.
If all else fails, and you have checked EVERY switch you can find several times plus the fuse and the bulb, then (and only then) should you think about pulling the fixture to check for a loose connection.