i just changed my dashboard lights to make them blue and for some reason they just wont light up, i put the OEM lights back in and they light up fine. Does anyone know what the reason is for these lights not lighting up?

My guess would be a faulty bulb or something along those lines, or your car just doesn't like that particualr bulb. Buy a different set if they're not too expensive and try those. If they work then problem solved, if not then I don't know what to tell you.