Ive just installed a Prosport Evo Boost Guage in to my 98 Gu and havent been able to find a place to piggy back a 12v illumination wire from so the colour will change when i put my headlights on. Has anyone used the 12v illumination wire from the stereo as its the only one i havent tried yet due to the large task of removing the facia and stuff.

I tried using the dimmer switch but this created a problem where the guage would work now but i wouldnt have any dash lights. My last resort is to run my own wire from the headlights to act as my own illumination wire. Does anyone have any advice or experience with this?