I would check the headlight switch. Are the rear lights working when the headlight switch is on?? I would "wiggle" the switch while on and see if the headlights are intermitent. If so, you'll know the switch is bad. Other possibilitywould be headlight relay. To diagnose this, change the relay from the fog light position and see if the headlights turn on.both of my headlights are out. I chaged the bulbs and have checked the fueses and everything looks ok. Does anyone know what might be causing this?