1997 Mercury Villager Owner Guide 1st Printing - Page 236

Driving Do not use single clamp bumper hitches or hitches that attach to the axle. Whenever a trailer hitch and hardware are removed, make sure all mounting holes in the underbody are properly sealed to prevent exhaust fumes from entering the vehicle. Safety chains Always use safety chains between your vehicle and trailer. Cross chains under the trailer tongue and allow slack for turning corners. Connect safety chains to the vehicle frame or hook retainers. Never attach chains to the bumper. Trailer Brakes Separate trailer brakes are required on most trailers weighing over 1,500 lbs. (680 kg). RWARNING Do not connect a trailer's hydraulic brake system directly to your vehicle's brake system. Your vehicle may not have enough braking power and your chances of having a collision greatly increase. Trailer Lamps Make sure your trailer lamps conform to federal and local regulations. Class I Trailer Tow electrical wiring provides two circuits (right hand and left hand) to operate trailer stop/turn tail lamps. Each stop/turn circuit will operate one combination stop/turn light bulb (# 1157, 3157, 2357, or 3357) on the trailer. Never add more than one trailer light bulb to one circuit. 237