parking lights and corner lights stopped working

i had generic coilovers for a bit then i put the functions on..and for some reason my corner lights and parking lights suddenly stopped working, but my headlights and brake lights work. anyone know what the problem is ?! its a 95 ex eg
do your rear parking lights still work or is it jus the front ones i had the same problem with my old eg and i ended up actually haveint replace the bulb sockets up front but i would start by checking fuses the wiring could be a bad or loose ground.