Sorry, I changed mine months ago. It seems there is a spring/clip typ attachment that holds the bulb holder to the case. You take this clip off, I dont know if you turn it clockwise etc. or not, but you pull the holder towards the rear where you will see the bulb. Pull the old bulb out and put new one in, dont thouch the bulb. Hope this helps, if not let us know, I'll go out in the morning and get better instructions, its cold out there.