Did they just stop working ?
Has your hubby done any work in van, that could of disturbed a wire ?
And most obvious, have you checked bulbs (altho unlikely, for both to go at same time)
If its only just stopped, may be something to do with the rain getting in, and shorting it, or corroding terminals.
I very much doubt it would be relay, as if it was, then none of them would work, (but am not 100% certain on that, so stuymac may be right)