DVSA have issued an update to the MOT testers manual reference electrical socket testing MOT inspection manual: cars and passenger vehicles Page summary: Inspection processes and rules for car, private bus and light commercial vehicle (class 3, 4, 5 and 7 vehicle) MOT tests. Change made: Lamps, reflectors and electrical equipment – 4.10. Trailer electrical socket – after the sentence ‘On vehicles fitted with a trailer 13 pin Euro-socket, use an approved device to check that the socket is wired to correctly operate the trailer:’ bullet point 4 ‘rear fog lamp’ has been removed. Time updated: 4:32pm, 14 October 2021