Re: Volunteer Travel Trailer 16'?
No, they don't talk with the brake lights. Some trailers may have an 'inertial' switch which applies the trailer brakes when it senses the tow vehicle slowing down. But most RV trailers have a 'brake' wire in the wiring harness, which connects to a 'brake controller' in the cab of the tow vehicle. This unit usually attaches to the brake pedal, and sends a variable voltage down the wire. The trailer brakes then are applied according to the amount of voltage (0V, no braking, 12V, full braking). Such trailers also have a 'breakaway switch' which is a cable attached to the tow vehicle, which pulls a pin and applies the brakes fully if the trailer and tow vehicle ever separate. Note that electric trailer brakes, no matter how activated, use the battery in the trailer to power the brakes, NOT the battery in the tow vehicle.