Funster No : 172
Join Date: Aug 2007
Location: scarborough, nth yorks
About Me: Waiting for Tommorrow
Interests: beer,tv and motorhoming
MH Type: A class
MH Model: Rexhall Rexair 6.8ltr V10 ford triton
Years Motorhoming: 8 years
Thanked 4,850 Times in 4,102 Posts
there will be a relay under the bonnet , close to the battery, which latchs when the engine is started providing power to the fridge.
If this fails then no 12v supplied.
Go back to the switch and connect a multi/volt meter to it and an earth point to check for 12v at the switch with the engine running.
If you have 12v there then there's a problem with the fridge...If not it could be the relay is stuck open or its fuse has blown...that should also be near the relay.
I'm trying to see it from your point of view
but i cant get my head that far up my ass