FORD 2012 Expedition v.2 - Manual (Page 235)

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.
Tires, Wheels and Loading
235
2012 Expedition (exd)
Owners Guide, 3rd Printing
USA (fus)