I changed a burnt out one yesterday - it was so easy once I figured out how it works that I changed both sides. Just pull the harness off - no clips but they feel tight the first time- might have to do some wiggling . Once the harness is off pull the wire retainer to the side to release and pull back. May be easiest to get the bulb out by grabbing one of the male terminals with needle nose pliers. Just make sure you get the notch on the bulb in the same place when you put it back and the wire retainer holds it snug - if it is loose it is not in correctly. Put the wiring harness back on and replace the rubber . I did both sides in less than 5 minutes but it took me an hour to figure out how it all worked first. Harness has to come off first.