Hello, First post on here as I only learnt of the site recently, I have a 2012 L322 4.4 TDV8, recently I noticed that my trailer RHS rear lights were not working and knowing I had a suspect plug on the trailer I replaced it to no avail, I then tested the socket (the 7 pin one) with my multimeter as that is the only one I use and found no supply to RHS trailer side lights.
Later, when I moved the trailer I noticed that I now have no LHS trailer lights as well.
Being a long time Land Rover owner I thought it would be a fuse !! I can only find 2 fuses with a trailer icon on on the RHS inner wing but as these are 15A and 30A I assume they are not for the lights.
Has anybody got any ideas what the problem might be as I am at a loss now !
Mousey

When i got my Car i swapped the 2 7 Pin Sockets for a 13 Pin one to suit the Caravan.
Even though the Pin/ Wire Connectors were sealed in the back of the Socket you wouldn't believe the corrosion i found in there so it could be a bad connection between the Wire and the Socket Pin.

A 13 pin genuine LR lead is easy to fit and is plug and play on your model year. The only tricky bit is fitting the rubber grommet through the body (use silicone spray as a lubricant).
It can also be used with an adaptor from the shop to top up the battery if vehicle is laid up for a while.
https://www.disco3.co.uk/shop/tow-electric...c-p45.html
I have an adaptor for my Ctek MXS10 that works through the 13pin. Magic  Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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Thanks to you both for suggestions but as I need it urgently it's gone into dealer this evening for work thursday, Fingers and credit card crossed.
Mousey

As above, easy and cheapest fix is to swap the plug. They shouldn’t charge you an arm and a leg as it’s a quick plug and play! There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

Mousey wrote:

Thanks to you both for suggestions but as I need it urgently it's gone into dealer this evening for work thursday, Fingers and credit card crossed.
Mousey

All done and dusted, dry joints in back of socket, Happy Bunny!!