California does not require brakes on motorized vehicles that are being towed, I asked three different Highway Patrol Officers all three responses where the same only trailers over 1500 in weight need brakes, a vehicle (motorized vehicle not a trailer) being towed by a motor home falls under the performance rule, many of the other States also have this rule the manufacturers of brake systems want you to purchase a brake system.
If having a brake system when towing a car behind an RV was a requirement, every law enforcement agency would be stopping RV's to check and ticket them, I do not have the book with me, read the book no where does it require an RV towing a car to have a brake system for the car, only trailers of 1500 and up.
navegator