Universal towbar electrics
Single, twin (12N/12S) and 13 pin kits and audible monitors explained.
Universal electrical kits are the traditional way towbars have been wired for years. The towbar socket is connected to the vehicle’s lighting using snap connectors, after finding each correct wire with a tester. Universal kits can be used for single, twin and 13 pin connections.
Depending on the vehicle and the electrics you choose, universal kits may need an audible monitor fitted:
Audible monitor
UK law requires that you’re told the status of the trailer indicators. An audible monitor (often called a buzzer) sounds when the trailer is connected and the indicators are working correctly.
Prefer plug-in wiring? See car-specific (dedicated) electrics.