they usually buzz when there not getting enough power, some cars need to use a relay cause they don't supply enough juice to the stock fogs & some cars require a module, like the bmw's, cause the bmw's are computer controlled & the computer needs to sense the bulb to turn it on, they need more power to ignite than they do to stay on, some guys have problems of them not starting unless the car is running & some have times when they might not start & need to be turned off & back on... stuff like that can usually be solved with a relay....
now you got me confused though, cause the wire I'm talking about is just a simple extension, they use that wire to extend the plug from at the headlight bulb, to outside at the ballast. there should be nothing in that wire, just an extension...
now you got me confused though, cause the wire I'm talking about is just a simple extension, they use that wire to extend the plug from at the headlight bulb, to outside at the ballast. there should be nothing in that wire, just an extension...



