If you have lights on a truck they are supposed to be operational.

Thanks guys, the majority rules, I am bowing too the Masters, I think it was a good idea, but I see the points you all have raised.

Back to the drawing board I go.

You can have as many lights you want. As long as you have Amber towards the front, and Red towards the rear. Even though, I have seen some trucks with Amber lights on the back of the sleeper. As many lights as you may have, all have to be working.