2012 Ford Expedition Owner Guide 3rd Printing - Page 235
2012 Ford Expedition Manual
Page 235 highlights
Tires, Wheels and Loading 6. With the trailer connected, but without weight distributing bars connected, measure the height of the top of the front wheel opening on the fender a second time, this is H2. 7. Install and adjust the tension in the weight distributing bars so that the height of the front fender is approximately halfway between H1 and H2. 8. With the ignition on and all doors closed, let the vehicle, now with trailer and weight distributing bars connected, sit for a few minutes to let the air suspension re-settle. 9. Re-measure the height of the top of the front wheel opening, repeating Steps 7-9 as necessary to obtain a fender height approximately halfway between H1 and H2 after the air suspension has settled. 10. Check that the trailer is level. If not level, remove the trailer, adjust the ball height accordingly, and repeat Steps 4-10. Safety Chains Note: Do not attach safety chains to the bumper. Always connect the trailer's safety chains to the frame or hook retainers of the vehicle hitch. To connect the trailer's safety chains, cross the chains under the trailer tongue and allow slack for turning corners. If you use a rental trailer, follow the instructions that the rental agency gives to you. 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 installed properly and adjusted to the manufacturer's specifications. The trailer brakes must meet local and federal regulations. The braking system of the tow vehicle is rated for operation at the GVWR not GCWR. Trailer Lamps Trailer lamps are required on most towed vehicles. Make sure all running lights, brake lights, turn signals and hazard lights are working. Contact your authorized dealer or trailer rental agency for proper instructions and equipment for hooking-up trailer lamps. 235 2012 Expedition (exd) Owners Guide, 3rd Printing USA (fus)