Electric Brakes For Towed Vehicles. For example, the demco 9599006 is only suitable for hydraulic brakes, while the demco 9599007 only works with air brakes. When a trailer uses electric brakes, it must be.
Breakaway kits are an important aspect of protective towing equipment. Some states require supplemental brakes (e.g., surge brakes, electric brakes, or portable braking systems).