7 Pin Wiring Diagram Auto. 2013 written by carbadmin in the uk trailer lights are normallly connected using a 7 pin plug and socket known as a type 12n. It is recommended that a split charge relay should be wired into your s type caravan wiring.
12s pin 4 must be permanently live for both battery charging and interior light etc functions to operate. Yellow pin for abandoned brake light and left handed markers. Narva 7 and 12 pin trailer connectors comply with all relevant adrs.
The first diagram is a simple set up of two brake lights two indicators and two side lights.
12v permanent direct from battery 5. This wiring diagram for 7 pin trailer plug model is far more suitable for sophisticated trailers and rvs. The 7 pin n type plug and socket is still the most common connector for towing. Earth for terminal 6.