Boat trailers are required to have lights, but not all trailer lights are waterproof. some trailer lights aren’t meant to be immersed in water and should be removed before launching. even if you have sealed trailer lights, don't let the connector plug to the car get dunked, especially when it's still connected.. Depending on the size of the trailer, additional markers / side lights / etc. may be required. most states require licensing, it may be in the form of a license plate, or a permanent registration. Trailers:federal lighting equipment location requirements important note: every lamp, reflex reflector, and conspicuity treatment (device) must be permanently attached in the location specified below and must comply with all applicable requirements prescribed for it by fmvss/cmvss 108..
