I have a motorhome based on a 55 plate 350 Mk6 Transit. On our last trip out the fridge would not work on the 12volt setting when moving between sites. I have found the fault to be with the fridge relay under the drivers seat. It has a permenent 12volt feed but no earth or trigger for the relay. Checking the wiring I have found the earth and trigger wires are tapped into the wiring for a large relay wedged down the side of the batteries. There is a small two pin plug and two large red cables that go to either batteries. The fridge relay wiring is spliced into the wires before the small plug.
Any ideas what this relay is for?. I could bypass these connections but I would like to know what this really is for first. Any ideas please. Considering how much this motorhome cost new I find the wiring under the drivers seat very amature and a mess.