Bongo Fury

Hi Folks. Trying to work out why our fridge has stopped working. Both batteries have over 12v. I’ve tested the relay below and it shows power through the connections on the left but nothing running out of the right one to the leisure battery. Will this only go live when the power in the LB drops or have we got a fault? If so, might this effect the fridge. Any help greatly appreciated. Thanks.

Really need good clear images to help on this, often of course is the fact that the fridges have a low-voltage cut-off which means they will fail to work when the voltage at the fridge itself is below the required level.