Robin, the fog light switch isn’t a latching switch, it’s a momentary switch. The only one of four that isn’t latching. And don’t forget it will only latch/function when the main lights are on.
Regarding the fuses, the factory did notice that the PCB was functioning as a fuse when there was an indicator fault and started adding extra fuses on some later cars. They’re not that difficult to add. They are located behind the dash.
Rog, where would be the best place to wire the extra fuse, would it be for each indicator side before it enters the PCB?
Many thanks
Will