When you take the fog lights out there should be a connector both on the light and the fog unit assembly. Simply take a cap full of vinegar (perhaps a shaving cream can cap) and dunk the assembly connectors in the cap for about two mins then dry them ( if you purchased new bulbs their...
fixing foglights
I had the same problem its not your fuses or the lights, its the connection. Due to the placement underneath the car it is highly susceptible to corrosion. So with this take them apart again and clean all the connectors, try vinegar its good at removing oxidation and...