Of course, no pws fluid on the b max, I was just thinking generalisticly.
Initial thoughts were low battery too, but I would be surprised if that caused a pws warning light.
pws issues do seem to be quite rare though on recent ford models.
Possibly then a blown fuse or new pws motor.
B Max Titanium X 1.0 125 bhp in Magnetic with built in SatNav and rear sensors.