Me and a colleague got into an argument, and I need help figuring out the legality/truth of the situation.
In Oregon, the law states that you must have two tail lights on a motor vehicle (as long as it is not a motorcycle): https://www.oregonlaws.org/ors/816.320 (1)(b)
It also states that the tail light has to be wired to be on when the headlights are on: https://www.oregonlaws.org/ors/816.080 (5)
My colleagues vehicle was OEM equipped with more than 2 tail lights. His claim was that if one of the tail lights is out (still having at least 2 functional ones) - it is illegal to pull that vehicle over with intent of either citing the driver or warning him of the issue.
My understanding is that a motor vehicle is a regulated device, and it is legal to pull driver over to warn him that a tail light is out.
Is it legal or not? And why?