Page 57 of 381

•Rotate to the left position (past detent) to turn off the interior lamps
and to disable the illuminated entry feature. When the control is in the
far left position, it acts as a dome lamp defeat/override.
Note:If the battery is disconnected, discharged, or a new battery is
installed, the dimmer switch requires re-calibration. Rotate the dimmer
switch from the full dim position to the full dome/on position to reset. This
will ensure that your displays are visible under all lighting conditions.
AIMING THE HEADLAMPS
The headlamps on your vehicle are properly aimed at the assembly plant.
If your vehicle has been in an accident the alignment of your headlamps
should be checked by your authorized dealer.
Vertical aim adjustment
Before aim adjustment, disable the air suspension system. Refer to
Message centerin theDriver Controlschapter.
1. Park the vehicle directly in front of a wall or screen on a level surface,
approximately 25 feet (7.6 meters) away.
•(1) 8 feet (2.4 meters)
•(2) Center height of lamp to
ground
•(3) 25 feet (7.6 meters)
•(4) Horizontal reference line
2. Measure the height from the
center of your headlamp (indicated
by a 3.0 mm circle on the lens) to
the ground and mark an 8 foot
(2.4 meter) horizontal reference line
on the vertical wall or screen at this height (a piece of masking tape
works well).
3. Turn on the low beam headlamps to illuminate the wall or screen and
open the hood. Cover one of the headlamps so no light from that lamp
hits the wall.
4. On the wall or screen you will
observe a light pattern with a
distinct horizontal edge towards the
right. If this edge is not at the
horizontal reference line, the beam will need to be adjusted so the edge
is at the same height as the horizontal reference line.
Lights
57
2012 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)
Page 60 of 381

BULB REPLACEMENT
Lamp assembly condensation
Exterior lamps are vented to accommodate normal changes in pressure.
Condensation can be a natural by-product of this design. When moist air
enters the lamp assembly through the vents, there is a possibility that
condensation can occur when the temperature is cold. When normal
condensation occurs, a thin film of mist can form on the interior of the
lens. The thin mist eventually clears and exits through the vents during
normal operation. Clearing time may take as long as 48 hours under dry
weather conditions.
Examples of acceptable condensation are:
•Presence of thin mist (no streaks, drip marks or droplets)
•Fine mist covers less than 50% of the lens
Examples of unacceptable moisture (usually caused by a lamp water
leak) are:
•Water puddle inside the lamp
•Large water droplets, drip marks or streaks present on the interior of
the lens
Take your vehicle to a dealer for service if any of the above conditions of
unacceptable moisture are present.
Using the right bulbs
Replacement bulbs are specified in the chart below. Headlamp bulbs
must be marked with an authorized “D.O.T.” for North America to ensure
lamp performance, light brightness and pattern and safe visibility. The
correct bulbs will not damage the lamp assembly or void the lamp
assembly warranty and will provide quality bulb burn time.
Function Number of bulbs Trade number
Headlamps (low and
high-beam)2 *See your dealer
Front park lamps 2 3157K or 4157K
Front turn lamps 2 3157A (amber)
Front sidemarker 2 168A (amber)
Fog lamps 2 H11
Front row map lamps 2 1600XB
2nd row reading lamp 1 1600XB
Lights
60
2012 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)
Page 61 of 381

Function Number of bulbs Trade number
Rear cargo lamp 1 211–2XB
Rear turn/tail/brake
lamps4 3057K or 4057K
Backup lamps 2 921
Supplemental tail
lamps4 906
Approach lamps 2 906
Mirror turn signal
lamps2 906 (amber)
License lamp 2 168
High-mount brake
lamp5 W5W
Visor vanity lamp -
Slide on rail system
(SOR)2 A6224PF
All replacement bulbs are clear in color except where noted.
To replace all instrument panel lights - see your authorized dealer
* For vehicles with HID (high intensity discharge) lamps, see your
authorized dealer for service.
Replacing interior bulbs
Check the operation of all bulbs frequently.
Replacing HID headlamp bulbs
The low/high beam headlamps on your vehicle use a “high intensity
discharge” source. These lamps operate at a high voltage. The bulb is
NOT customer replaceable. When the bulb is burned out, the bulb must
be replaced by your authorized dealer.
Replacing front parking lamp/turn signal/sidemarker bulbs
The front parking lamp/turn signal/sidemarker bulbs are located in the
headlamp assembly. Follow the same steps to replace either bulb.
1. Make sure the headlamp control is in the off position.
2. Open the hood.
Lights
61
2012 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)
Page 269 of 381
The fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingProtective Circuits
1 30A Driver window
2 15A Driver side memory module
3 15A Audio rear seat controls, Satellite
radio, SYNC
4 30A Passenger window
5 10A Keypad illumination, 3rd row seat
enable, Brake-shift interlock
(BSI), Smart fuse panel logic
power
6 20A Turn signals
7 10A Low beam headlamps (left)
8 10A Low beam headlamps (right)
9 15A Interior lights
10 15A Switch backlighting, Puddle lamps
11 10A Not used (spare)
12 7.5A Power mirrors, Driver seat
memory switch
13 5A Not used (spare)
14 10A Power liftgate module – keep-alive
power, Clock
15 10A Climate control, Global positioning
satellite module
16 15A Not used (spare)
17 20A Door locks, Liftgate release,
Liftglass release
18 20A Second row heated seats
19 25A Rear wiper
20 15A Adjustable pedals, Datalink
21 15A Fog lamps
22 15A Park lamps
23 15A High beam headlamps
Roadside Emergencies
269
2012 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)