Fog Lights Keep Blowing Fuses

[SnoqualmieE30]

I installed a driver's side fog light in my '90 325i the other day and it worked for a few hours until I blew the fuse. I replaced it with a new one, but when I turned the fog lights on the new fuse blew in about half a second. Could this be a short in the wiring? And if so, is there a common place that fog lights short out?

[AndrewBird]

Are these factory fogs, or aftermarket?

If factory, could be a bad relay. Or like you said, a short somewhere. Just going to have to trace the wires.

If aftermarket, where are you running power from?

[SnoqualmieE30]

They are the same as the originals, just new (not made by BMW). I just plugged them into the cord where the originals plugged in. Its a black wire with a blue plug at the end?

[AndrewBird]

Are you sure you are using the correct rated fuse? Maybe the new lights are higher wattage and thus draw more power? Otherwise, you have a short somewhere.

[SeatownE30]

So what happened? Were you able to fix your fog light issue? If so, what was it? I'm having the identical problem :(

[robrez]

I had the same problem with a set of used fogs I bought. Turns out the PO had installed higher wattage replacement bulbs. I put the correct bulbs in and they work fine now.