I have a brake controller in the MH under the steering wheel which also displays info on braking of the dolly. The dolly has its own lights so no lights on car required. I do however, carry a set of magnetic tow lights just in case. I ran over an aluminum fender lost by some other trailer and it pulled the dolly electrical cord out of the connector so I attached the magnetic tow lights to the car, unplugged the dolly and plugged the tow lights in. At my next campsite I reconnected the dolly cord to the connector and verified all dolly lights functioned. Note: When running the tow lights it means that the dolly brakes are not functional.