However, tonight, completely out of the blue my exterior lights quit. They just completely blacked out while I was tooling around exploring back roads in the dark out in the middle of nowhere.

Under the hood I found one 10 amp fuse blown so I replaced it with a different one from further back on the fuse box which evidently was for the radio & dash lights. Oddly, after replacing the fried fuse, the lights remained dead.
Fortunately Mitsubishi put the 4-way flashers on a separate circuit so I was able to make my way slowly back to the motel with just the flashing 4-ways lighting the way.
I've put the good 10 amp back where it had been and am now wondering what to do with this tomorrow.
I've checked all other fuses and they each appear to be intact so I'm kinda' baffled.
Any suggestions would be appreciated.
Thanks.
