Dr Strangeglove

Just for future reference, I had the same problem, initially thought it was a fuse problem, but on inspection found a small round yellow plastic thing on the cockpit floor.

Managed to wiggle into the space under the steering wheel and reinsert the plastic in the round hole fitting next to the brake light switch. Fixed the problem immediately.

So, before you start pulling out fuses and check wires, check the grommet first