When we first got the car in '93 the we had Factory Fogs installed and Rear Spoiler...Now the LEDs in the Rear Spoiler are really dim. and the Fogs stop working...I take it to Nissan they say they are not factory...I look closer and they are Bosche and They are slightly smaller..But Nissan Say they didn't install them But I have the Factory Switch for sure..to the left of the Steering colum. I checked the fuses...and the Bulbs and they are fine...
I'm guessing something in the wires...anyone else have this trouble too?

 

. Realys go bad .... somtimes

 

FYI: the fog lamp relay should be just in front of the battery. Among the first row, it's the one most towards the passenger's side. This info comes from the Haynes manual.

 

Das relay is bad.