Ford

I have a ford fiesta ( mk 5 ) my tail lights work fine.. but both the brake lights do not.. however the main centre light bar in the rear windscreen does work fine

Your brake lights and signal are on same filament in bulb . turn key on and try signal lights. if they dont work ethier then you have a bad ground near frame on back of car. but mos likly is the sockes are corroded and need to be cleaned. you might have a rare instance where both bulbs burned out . if you replace bulbs dont touch new glass with bare hands the oil from fingers traps heat and they will burn out quiker. if u need more info email me. thse cars plus the focus are famous for headlamps and tail light bub , brake, burn out. your bar in the center is led lights they never burn out.