Low Beams and Highbeams both went out

On a few occasions, we've had a vehicle come in with both headlites burnt out.. We surmised the drivers had been unknowingly driving with one headlite for a while, (like you never see, ha ), when the other goes out, THEN they notice..

And of course you figure,, can't be both seal beams at once,, lol.. so you check all the other stuff,, only to learn to check power to the headlites 1st...

hope it helps