Hello, the other day I noticed that my brake lights are on all the time while driving. They only come on permanently with the headlights but they work normally as they should when you press/depress the pedal when the headlights are off. I noticed it happened after a long drive on the M4 in the rain and lorries were displacing insane amounts of water when you overtake them so I suspect something got wet ? Anyone got any suggestions, car is a cinq sporting, Thanks

Check the earth points on the rear light units.