The high level brake light on the C4 has packed up. A test lamp across the plug shows that the wiring is OK but I cannot get the light unit to work. Is it possible to replace the LED's? From all of the ads on EBay for brighter ones I guess this should be doable but I can't see how the lamp comes apart.
More realistically, does anyone know how much a new unit from Citroen would be? MOT due next month
Phil