Ford Edge Owner's Manual page 246

Hitches
Do not use a hitch that either clamps onto the bumper or attaches to the
axle.
Distribute the trailer load so 10-15% of the total trailer weight is on the
tongue.
Safety Chains
Note: Never attach safety chains to the bumper.
Always connect the safety chains to the hook retainers of your vehicle
hitch.
To connect the safety chains, cross them under the trailer tongue and
allow enough slack for turning tight corners. Do not allow the chains to
drag on the ground.
Trailer Brakes
WARNING: 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.
Electric brakes and manual, automatic or surge-type trailer brakes are
safe if you install them properly and adjust them to the manufacturer's
specifications. The trailer brakes must meet local and federal regulations.
The rating for the tow vehicle's braking system operation is at
the gross vehicle weight rating, not the gross combined weight
rating.
Separate functioning brake systems are required for safe control
of towed vehicles and trailers weighing more than 1500 pounds
(680 kilograms) when loaded.
Trailer Lamps
WARNING: Never connect any trailer lamp wiring to the
vehicle's tail lamp wiring; this may damage the electrical system
resulting in fire. Contact your authorized dealer as soon as possible for
assistance in proper trailer tow wiring installation. Additional electrical
equipment may be required.
Trailer lamps are required on most towed vehicles. Make sure all running
lights, brake lights, turn signals and hazard lights are working.
2013 Edge (edg)
Owners Guide gf, 3rd Printing
USA (fus)
Towing 245