Tonight my S2 has decided to illuminate one of the driving lights when on dipped beam. Both work on main beam as usual. Before I get the multimeter out, is this is a common problem with a common fix?
Yes, it's possible. It's been a dry day today so it would have had a chance to dry out. It must be combined with another problem though, as it's been my everyday car for three years and I've previously driven through hugely heavy rain and even deep floods without an issue!