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I have a 2004 firecat F7. When sled is cold headlights work fine, as i drive, the headlights get dimmer. Eventually the bulbs blow. I am leaning towards voltage regulator getting hot and surging power. Last year i did blow a blelt which unhooked the regulator. I hooked it back up but my headlights blew out and shorted the tachometer. I replaced all that and checked the plug ins. now i just cant seem to keep bulbs in the girl.. Help please?