5. With the ignition on and all doors closed, let the vehicle with trailer
sit for a few minutes to let the air suspension re-settle.
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 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 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.
Separate functioning brake systems are required for safe control
of towed vehicles and trailers weighing more than 1500 pounds
(680 kilograms) when loaded.
244
Towing
2013 Navigator
(nav)
Owners Guide gf, 1st Printing
USA
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