It seems that my 03 WRX is just becoming and endless stream of problems, from the boost control system, to detoniations, and now there is no backlight for the instrument cluster. The needles, boost gauge and all other parts light up when I turn the headlights on, and only the gauge cluster stays dark. I flipped the dimmer a few times, but the backlight won't turn on. I can probably fix this, but I'm not sure where to start looking, as I'm not familiar with the electrical system of this car. So, if anyone could point me to a few possible problem locations, that would really help.