So I've confirmed that the lights unit are fine, the wires running to the lights are fine, the fog light switch is fine, the grounds are fine, the light bulbs are fine, the circuit breakers are fine.
Oddly when I turn on the light switch I can measure 6 volts going through the fog light switch.
I've pulled the seats and steering wheel to try and get access to the brake light switch. I can't see it let alone reach it.
I've got a old Cobra alarm/ immobiliser circa 1996 in the car. The company sent me an installation guide which isn't much help figuring out where everything goes.
In the frunk (forward trunk) I have a set of modern fuses and under the dash several more modern fuses which i have no idea what are used for. Possibly the alarm and possibly the stereo.
Wondering what to look at next. Giving the battery a good charge overnight incase it is a low battery but I doubt it as the car starts OK.