Mind taking a picture of it?

 

Any idea? Thanks.

 

Look in your owners manual. That book explains many things........including that switch.......

 

There is no switch therefore there's obviously no manual info, there's just a plug that connects to a missing buton, an empty shell that's what I want to find out.if it was in the manual i d know about it. If you don't know the answer why bother replying?

 

I replied because I know the answer, and I know the answer because I looked it up in the manual.....try it, you might learn something.......Its in the manual, just look.....its not hard to find....

 

"it s iN tHe mAnUaL", first off there is No button there just an empty shell that has a plug, secondly, even though I do have the manual and it's 400+ pages long, no, ITS NOT IN THE Manual because the car DOESN'T HAVE THE BUTTON. 2.not all manuals are the same ,different model line, different manuals. 3. The shell has a part number which corresponds with 3 switches that fit , dsc - if I had that there would be a button there and also it wouldn't have the tires making squinting noise at brutal launches, dash illumination adjustment - which I have, and headlight beam level adjustment - which the car can't have because the headlights are standard. So rather than being useless and annoying let someone else who really knows the answer reply. You could've said it's dsc or whatever you found in YOUR manual but that's not the case either way

 

2.not all manuals are the same ,different model line, different manuals.

Again, you should actually RTFM.
From page 1 of your manual-

 

Wow....open the manual to section 1 page 2. Its as simple as that. Switch #4 is located to the left of the dash dimmer. Its used to operated the headlight levelling system, which your car apparently does not have. However, as Mazda for the most part uses the same wiring harness for every car to make the assembly process easier, all the wiring is there. There is a dummy placeholder switch to secure the plug behind the panel. Anybody who has hacked up their wiring harness extensively should know that by now....

The internet generation.....click and ye shall receive.....geeez........

 

Damn, beaten to the punch. I was going to say the leveling switch. This is how it looks like on the Mazdaspeed3

 

And a close up of the switch itself (to the right). Only works with factory HID headlights though. Fuse is in the interior fusebox (I forgot what number, but it's a 15a iirc).

 

Any chance finding that fuse number?