Your lights are 12V and have nothing to do with the 120V AC system used on the plugs.
Did you use the correct bulb in that fitting? Remove the bulb and check the contacts are clean and shiny, the same for the base of the socket. Check the fuse with an ohmmeter or voltmeter or substitute a KNOWN good one. Fuses often break (burn) in ways you cannot see by simply looking at them.