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Get a multimeter on Volts dc range and the pin orientation, connect black lead to earth pin and test each pin by connecting the red lead in turn with lights etc turned on.

Alternatively you could use a 12v bulb connected to 2 leads, connect one to earth then test each pin in turn.

Or a caravan dealer can probably plug a test rig into it for you.

Quote: Originally posted by johnjory on 23/4/2010

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Some things are quite tedious if you are not sure yourself and /or don't have puropse designed test gear, and in my opinion, this is one of them!

There will be a cost involved, but if you really feel you want it tested, best go to a tow bar fitter and ask then to check it on their test rig. It will only take then seconds and if a repair is required, you are in exactly the right place!

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Quote: While I was checking the fridge, with the engine running, I flicked the changeover switch to 'car' and the voltmeter chowed a nice healthy reading, but when I seleceted 'caravan' it was down a bit.

Quote: Originally posted by RichardB52 on 09/5/2010

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That's normal behaviour isn't it? On "car" it will be getting the 14V the alternator puts out but on "caravan" it will just get the 12V from the leisure battery. If it wasn't charging you wouldn't get a higher voltage on "car".

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