Dave, are you trying to wire the front fogs to the same circuit as the rear and use the same switch?
If you are something to consider…. The pcb that controls the fog lights with its dodgy relays is a just tad flakey. There are numerous reports of the fog lights (pcb) failing and mine have too. One day the fog lights decided to come on and stay on no matter what I did. So to enable the car to pass the MOT I’ve wired my fog to a temporary switch with a separate new circuit that is only live when the lights are on.
Long term my plan is to abandon the pcb but keep the same dash switches and have a more conventional control box under the bonnet, but that's when I have more time….
