where is the head light wire i use? or is it one of the wires going to the dimmer switch on the left side of the steering wheel?

 

tap into the one in the stereo harness.

 

have any more info then that? maybe witch wire on the radio plug?

 

I guess. Since you dont want to probe and flip the lights on...

http://mazda-speed.com/faq/audio/

 

my car is stored 30 mins from here, i try to have everything figured out before i drive over there to fail.

TNS+ (Dimmer) and ILL- (Dimmer Return). do i to complete a circuit with the dimmer return or just hook the yellow wire to the tns+?

<3 you y8s

 

I can't remember for sure, but I think most "dimmer wires" go to 12V when you turn the lights on. all you gotta do is tap that wire and run it to the gauge "dim" wire.

http://www.innovatemotorsports.com/s.../DB_manual.pdf

they say to use an actual headlight power wire. Which is pretty lame.

Just pull out you stereo, stick a probe in the harness with the key on and lights off and measure something below 3V and turn the lights on and measure 12V and you're in business.

 

I used the radio dimmer wire in mine.