Lighting Test Unit for Caravans & Trailers with 7 pin plugs

I made this unit up myself a good few years ago and it served me well for several caravans and a trailer. It is set up with 2 power sources, either 240v mains or 12v DC car/leisure battery, switchable on the front of the case. The mains cable can be unplugged when not required. There is a large rotary switch on top, to enable selection of each light in turn, as per the individual connections on the standard 7 pin trailer/caravan plug. It is reasonably heavy owing to the size of the inbuilt transformer; hence the level of the Postage/Carriage charge being applied. Personal collection is also possible.
The rotary switch positions are:-
1/. Off
2/. L.H. Indicator
3/. Brake
4/. R.H. Indicator
5/. R.H. Tail
6/. Fog
7/. L.H. Tail
Postage, if required, would be £10. Read more