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211022 don bur coupling info

What are HGV Trailer Couplings?


Trailer couplings refer to both the electrical and pneumatic lines that span between, and connect, the tractor unit and trailer.

They comprise:

  • Primary Electrics (24N - ISO 1185) UK only
  • Secondary Electrics (24S - ISO 3731) UK only
  • ABS/EBS (ISO 7638-1) Mandatory across all of Europe, including the UK
  • 15 Pin Electrics (ISO 12098) Europe only
  • Red emergency airline
  • Yellow service airline

The airline coupling type varies slightly between the EU and the UK.

Published: Tue 21 Nov 2023

Updated: Thu 11 Apr 2024

Don-Bur (Bodies & Trailers) Ltd

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