Replaced the license plate lights today with LEDs. I got them both in--one worked and the other did not, so I flipped the non-working one to match the + and -. Well, when I tried to test them again, neither came on, and also the interior backlighting on the speedo, radio, etc. will not light--thus, I'm assuming I have blown a fuse. I am new to the fuse box, so could someone please provide or direct me to some instruction? Thanks!