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Sounds like you need to find an autoelectrician amongst your mates somewhere. The have the tool to plug into the socket to test the wiring. Alternative for you is to undo the plug & check the connections & trace the cable into the chassis & it'll end up in another juvnction box, check to see if any of the wires have come out inside there.

Second place to check is the car. Look where the cables go up into the back of your car, follow them inside & look to see if any of the scotch locks have come undone or aren't making good contact. If you look you'll see which wires go where.

All the best

BB  

If you have some lights working it has to be a wire job.

hi see here

http://www.towitall.co.uk/trailer_wiring/instructions.htm

sounds like the..... 

Hi Ruth , it sounds like a broken earth connection going to the drivers side lights on the caravan , to prove this , remove the rear light lenses and run a wire from one side to the other , connect the wire to the outside part of the bulb holder on each side of the side lights , do they now work ?
If not , then it will be a faulty connection with the brown wire that supplys the lights on the drivers side , the fault could be inside the plug that connects the caravan to the car , inside the socket on the car , inside the car boot where the wire joins the car wiring loom . To check this find where the brown wire connects to the car wiring loom ( normally near the rear light clusters ) , now trace the wiring where it comes inside the caravan and locate the brown wire . Now run a wire between the 2 places and see if the lights now work .

There are easier ways to find the fault , like using a multi-meter , but i'm trying to explain how to track down the problem with just a length of wire which is easy to get hold of , and fairly straight forward to check with .

Caravan_wiring

atb

Wizard

well discribed wizard

even I understood that. lol.

one of my best purchases was a multi meter for that very reason.

Breynia

dont give up on caravanning just yet , this is but a minor hic cup. you will love it honest you will.

Try swapping the bulbs round , you may have some duff ones , also clean the sockets that they fit into .

atb

Wizard

Breynia we had a problem with road lights working intermittently.we couldnt find a fault with plugs sockets etc.When we arrived at site we asked another caravannner to hook up to our van to make sure if the fault was at the car or van(if you see what i mean).Our problem was at the car. The towing electrics cable is run under the car body and up through the floor beneath the drivers seat and  into a connection block there. Because of a poor connection, when the carpet moves the connection opens and closes causing the lights to go on and off.Any trailer /towbar fitter such as Indespension will have a lights tailboard to connect to your car to trace the fault.Hope this is not a red herring.Enjoy your trip