big_mike1979

. I was driving and both fog lights went out. So I knew it was a fuse. I opened the panel on the side of the door and it's top row fuse number 9 and it takes 15. *So I changed it to 15 and would not work. I put 20 and it works. Why is that ?
I have hid conversion fog lights and had them for a year running on 15
Ty in advance

jbenz2001

That's def weird bro,did it pop the 15 before putting the 20?
Oh btw I hit you up the other day bro,do you still have the same number?

Pancho

Hmm? Seems something is running too hot for the proper fuse, and blows a 15A, but not hot enough to blow a 20A. Something is hotter that normal. Might be a loose filament in one of the fog lamps. When it randomly contacts again, they sometimes burn very, very bright, and hot--a sort of arcing light. Are both fogs equally bright, or is one brighter.

big_mike1979

what do u mean did it pop the 15????
yes bro, i got the same number.. I guess u were one of the 4 missed calls taht i got.. My i phone was acting up and it said i got 4 missed calls but no numbers where showing!!!! then i got 4 texts and were blank as well..
Sorry about that... I call u tomorrow

big_mike1979

Dunno what it is.. First time i ever change that fuse.. NO i got the hidconversion on both fog light ( 20000 k blue)and everything is a snap in so all is securely tight!!!! Next day one of the ballast died....
yes both are equally Bright Pancho

Pancho

When you say, "So I changed it to 15 and would not work.", do you mean that you put in a new 15A fuse, and that the new fuse blew out ?

big_mike1979

I tried 4 diff brand new fuses of 15a And fog light would
Not work. I tried 20a fuse and worked. It's driving me crazy for not knowing

CLK55_NYC

I'd stick to the recommended rating, by bumping it up to 20 you are allowing more current to flow thru the wires than designed for but being a German car it may be over engineered and not matter.

big_mike1979

If I put 15a I can't use my fog. They won't turn on

VIPclk320

Did you recently change your bulbs to a higher K? If so that could be the reason. The wiring is meant to run with halOgen bulbs and when you to high intensity setup that happens. It's not a big deal to run 20A, just check your fog light wires(the factory wiring not the hid kits wiring) and see if they are hot after having your fogs on for about 10 minutes on the 20A fuse, I the wiring is not hot then your good to go. Make sure you do this when the car is cold, preferably after the car has been parked for 5 to 6 hours.

big_mike1979

not my fogs.. i kept my fogs at 20000k and had em for about 6 months. i only changed my high and low beam from 20000 to 30000k.
ok i will do it tomorrow morning and will checking the factory wiring. ty