my miss got pulled over today, she got a peugeot 106 (series 1) Lreg.

anyway she got pulled because when she brakes or something not only her brake light comes on but they all come on, only on the drivers side, but it needs to be sorted in 5 days of big fine will happen.

what could this be? is it easy fix?

i was thinking it is the circit where all the bulbs plug into. but am not sure.