Had the same issue
Heard a click while driving and the dash lights went out & radio brightened.
Thought it was related to automatic DRL.
Checked all fuses etc, until I notices ANOTHER fuse holder under the hood - drivers side.
The fuse for the instrument lights (15a) was loose in the socket. Poor cover doesn't seal underhood holder well, and there was corrosion making the socket loose. Bent the tabs after cleaning up and inserted the fuse )had friction now. Sprayed holder with WD40 to keep corosion down.
All better. Misleading looking for a DRL issue. Figured it had to be the dash switch, but nope....