4. Attach the trailer to the vehicle and adjust the hitch equalizers so that
the front bumper height is within a1 2” (13 mm) of the reference point.
After proper adjustment, the rear bumper should be no higher than in
Step 3.
5. Turn the air suspension (if equipped) control to on.
WARNING:Do not adjust a weight distributing hitch to any
position where the rear bumper of the vehicle is higher than it
was before attaching the trailer. Doing so will defeat the function of
the weight distributing hitch, which may cause unpredictable handling,
and could result in serious personal injury.
Safety chains
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.
Do not attach safety chains to the bumper.
Trailer brakes
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.
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.
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
250
2010 Navigator(nav)
Owners Guide(own2002), 1st Printing
USA(fus)
Spark plugs,
specifications .............367, 371–372
Special notice
utility-type vehicles ....................6
Specification chart,
lubricants ...................................368
Speed control ............................110
Stability system .........................263
Starting a flex fuel vehicle .......257
Starting your vehicle ........254–257
jump starting ..........................313
Steering wheel
controls ....................................112
tilting .........................................99
SYNC..........................................78
T
Third-row power fold seat .......172
Tire Pressure Monitoring
System (TPMS)
Driving .....................................286
Tires, Wheels and Loading ....232
Warning Displays ................12, 26
Tires ...........................217–219, 303
alignment ................................226
care ..........................................222
changing ..........................303, 307
checking the pressure ............222
inflating ...................................220
label .........................................231
replacing ..................................223
rotating ....................................226
safety practices .......................225
sidewall information ...............227
snow tires and chains ............237
spare tire .................................303
terminology .............................219
tire grades ...............................218treadwear ........................218, 222
Towing .......................................244
recreational towing .................253
trailer towing ..........................244
wrecker ....................................319
Transmission .............................272
brake-shift interlock (BSI) ....271
fluid, checking and adding
(automatic) .............................364
fluid, refill capacities ..............368
lubricant specifications ..........368
Turn signal ..................................90
U
Universal garage door
opener ........................................114
USB port ......................................38
V
Vehicle Identification Number
(VIN) ..........................................373
Vehicle loading ..........................237
Ventilating your vehicle ...........258
W
Warning lights (see Lights) .......12
Washer fluid ..............................338
Water, Driving through .............291
Windows
power .......................................104
rear wiper/washer .....................99
Windshield washer fluid and
wipers ..........................................97
checking and adding fluid .....338
liftgate reservoir .....................338
replacing wiper blades ...........339
Wrecker towing .........................319
Index
385
2010 Navigator(nav)
Owners Guide(own2002), 1st Printing
USA(fus)
