How do you change plate light bulb on citroen c3?

I presume you mean number plate lights on the car boot.

Take out the plastic lens cover over the bulb. You will need a small screw driver to push and it should pop out. Replace the bulb (Bulb: W 5 W ). Replace the lens which should click in place.

Check this link for photo and instructions which will help: http://citroenc3owners.com/Citroen-c3-tips/topic30.html

Read more: http://wiki.answers.com/How_do_you_change_license_plate_bulb_on_a_citroen_c3#ixzz1bJhbE1Tx