What is the correct 12v wiring for the car side of a 12S plug for a modern caravan. Fridge and charging?

The exact wiring and use of relays etc. is very confusing. Different views on different web sites! Have just had the wiring changed on my car in readiness for a new caravan. Pin 6 (fridge) is permanently live (engine running or not) which doesn't seem right as the battery would soon be discharged. Pin 4 is also permanently live.

Answers:
Did you specify to the tow bar fitter whether your caravan was built before or after 1998. They changed the connectors then. The following link should take you to a guide;

http://www.caravanclub.co.uk/nr/rdonlyre.

If it does not work, go to the caravan club website and search for "12S".

Either way, I don't think your pin 6 should be permanently live.
Pin12S (Suplimentary) Wiring for Appliances.
1Reverse Light and/or Reverse Brake System
2Auxillary/Split Battery Charging
3EARTH
4Auxiliary Power from Car Battery
5Warning Light with Common Return
6Refrigerator Power
7Spare
Your car sounds correct, pin is from car battery, and pin 6 fridge needs to be connected or the fridge wont work, this will only use power when connected obviously.

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