Lights

Hi

Went to drive home this evening, the car started however the lights wouldn't come on.

I intially thought it was a fuse, left it for about five minutes, then tried again, and the lights worked.

Any ideas, its been very damp around here. Could it be a dodgy earth.

Not great with electrics, so please be basic as to where I should start looking.

Thanks

Could be dodgy earth, supply or switch