not a simple fix sorry. the body control ecu is detecting a higher current drawn than expected so switches off the circuit to protect it. often turns out to be a corroded connector on the wiring loom. the only answer is a proper auto electrician or many hours trial an error under the van
it sounds like an earth fault to me.. I would check the nearside rear light cluster first , you may find it is wet and or corroded.. and simply needs cleaning drying out .. a sign that it may be suspect is moisture on the inside of the lens.
if that is ok, the next suspect is under the rear of the van.. convertors extend the existing loom, look for a square joint box, same procedure.. look inside for dampness and dry out and repair renew any suspect connectors..
If that is OK look at the front light .. unlikely but not impossible for it to get wet due to a cracked lens..
If still no luck you may need to consult an auto electrician
Hi, welcome to the forum, enjoy your travels. Had a similar problem on my Hymer after I took the hydraulic motorbike carrier off, the earth to the lights was using the steelwork, corroded wires etc, remade the earths and all working, have you changed anything on your van? Any the tech guys will be along soon good luck.
first of all thanks for the welcome. and yes it is 2 years.
also thankyou for help with the problem ive got, i think an auto electrician is the best bet.
Good luck and thankyou everyone, ps HAPPY XMAS!!!!!!!!!!!!!!