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Trailer Lighting Requirements

Trailers must have on the back two red sidelights, two red stop lamps, an illuminated number plate and two triangular red reflectors plus amber indicators designed to flash between 60 and 120 times per minute. If they are more than 1.3m wide, they must also have at least one red fog lamp. All trailers built after Sept 30th 1990 require front reflectors. They must have front reflectors and, if they are more than 1.6 metres wide, front position lights.

Requirements:

  • If, in the case of direction indicators, it is not possible to meet the maximum height requirements, this dimension can be increased to 2300mm.
  • If, in the case of the rear position (tail) lamps and stop lamps, it is not possible to meet the maximum height requirements, this dimension can be increased to 2100mm.
  • On trailers manufactured after 1 October 1985, the maximum height of the red triangular reflectors can be increased to 1200mm if necessary.
  • Trailers manufactured after 1 October 1985 require numberplates, illuminated by an 'E' or 'e' marked lamp. If a clear window in the rear position lamp is approved, this can be used instead of a separate numberplate lamp but must be fitted to the manufacturer's instructions with regard to distance from the numberplate.
  • At least one rear fog light is mandatory on trailers over 1.3 m wide. Two lamps are preferred but, if only one is fitted, it must be to the offside or on the centre line of the trailer.
  • No maximum distance from the outer edge of the trailer is stated for a fog lamp(s) but there must be a minimum distance of 100mm from the stop lamp.
  • The distance of the direction indicator from the side of the trailer may not exceed the actual distance of the rear lamp by more than 50mm.
  • Trailers manufactured after 1 October 1985 which are more than 1600mm wide, (except boat trailers) require front position lamps (clear lens).

Certain trailers must have side position lights which show white to the front and red to the back. In addition, trailers over certain lengths must have amber side reflectors.

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