SEAN

G,day Mate, this can be caused by wrong wattage bulb/s, (most common) the holders should say correct wattage. Also poor earths and/or corrosion in conectors and contacts which can be a bugger to find. Does light come on as soon as engine starts? If so you may have a faulty detecting unit. If the light comes on when you first press the brake, it is in that cuircut, or if it comes on when you turn tail lamps on it is a problem there. Good Luck, that is about all I know!!!!