Why do some trucks have a green light behind the cab on the tractor unit, eh? Answer me that. Seems to be tankers (was following one tonight), but I'm sure I've seen them on others. Usually a four-LED bulb, shining sideways. Ta muchly.
Abs light , should go off at 10 -15mph if not there is a problem with the trailers abs/ebs system or leccy fault . take the bulb out and its cured -- joking of course
