Page 64 of 348
Replacing front parking lamp/turn signal bulbs
1. Make sure the headlamp control is in the off position and open the
hood.
Halogen headlamp
HID headlamp
2. Remove the hex head screws attaching the underbody forward
aeroshield and remove to gain access to the front parking lamp/turn
signal assembly.
3. Rotate the socket counterclockwise and remove from the lamp
assembly.
4. Carefully pull the bulb straight out of socket.
Install the new bulb in reverse order.
Lights
64
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)
Page 65 of 348
Replacing front sidemarker bulb
1. Make sure the headlamp control is in the off position.
2. Remove the hex head screws
attaching the underbody forward
aeroshield and remove to gain
access to the front sidemarker
assembly.
3. Rotate the socket counterclockwise and remove from the lamp
assembly.
4. Carefully pull the bulb straight
out of socket.
Replacing tail lamp/brake/rear turn signal lamps
See your authorized dealer for replacement LED assembly.
The tail lamp, the brake lamp and the turn signal lamp are located in the
tail lamp assembly. Follow the same steps to replace these lamps.
1. Make sure the headlamp switch is
in the off position, then open the
trunk.
2. Carefully remove the fasteners
around the lamp area and then
remove the interior trunk trim.
Lights
65
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)
Page 66 of 348
3. Unbolt the three tail lamp
attachment nuts and remove the
lamp assembly.
4. Rotate the LED assembly
counterclockwise and remove it
from the lamp assembly.
5. Disconnect the LED assembly
from the electrical connector and
replace the LED assembly.
6. Install new LED assembly in
reverse order.
Replacing backup bulbs
The backup lamps are located in the tail lamp assembly. Follow the same
steps to replace either bulb.
1. Make sure the headlamp switch is
in the off position, then open the
trunk.
2. Carefully remove the fasteners
around the lamp area, then remove
the interior trunk trim.
3. Unbolt the three tail lamp
attachment nuts and remove the
lamp assembly.
4. Rotate the bulb socket
counterclockwise and remove it from the lamp assembly.
5. Pull the bulb straight out from
the socket.
Install the new bulb in reverse
order.
Lights
66
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)
Page 67 of 348

Replacing rear sidemarker lamp bulbs
1. Make sure the headlamp switch is
in the off position and locate the
sidemarker on the rear bumper
fascia.
2. Insert a flathead screwdriver
between the rear of the sidemarker
lens and the bumper fascia.
3. Push the screwdriver to the front
of the vehicle and then slide it towards you to pop out the lamp
assembly.
4. Carefully pull the bulb straight out of socket.
Install the new bulb in reverse order.
Replacing fog lamp bulbs (GT) (if equipped)
1. Make sure the headlamp control is in the off position and open the
hood.
2. Remove the sight shield by
loosening the fasteners with a
flathead screwdriver.
3. Remove the two underhood bolts
attaching the bumper cover next to
the grill and then pull the
cover/grille/fog lamp assembly
forward to access the fog lamp
bulbs.
4. Disconnect the electrical
connector from the bulb by pulling it straight off.
5. Rotate the bulb counterclockwise and remove from the lamp assembly.
Install the new bulb in reverse order.
Lights
67
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)
Page 68 of 348
Replacing fog lamp bulbs (V6) (if equipped)
1. Make sure the headlamp control is in the off position and open the
hood.
2. Remove the hex head screws
attaching the underbody forward
aeroshield and remove to gain
access to the fog lamp assembly.
3. Disconnect the electrical
connector from the bulb by pulling
it straight off.
4. Rotate the bulb counterclockwise
and remove from the lamp assembly.
Install the new bulb in reverse
order.
Replacing license plate lamp bulbs
1. Make sure the headlamp switch is
in the off position.
2. Remove the two screws and the
lens from the license plate lamp
assembly.
3. Carefully pull the bulb straight
out from the lamp assembly.
Install new bulb(s) in reverse order.
Lights
68
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)
Page 200 of 348

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.
Do not splice into the vehicle lamp wiring for trailer lamps. Your
vehicle uses an advanced electronic module to control and
monitor your vehicle lamps. Splicing into the wiring or attaching
wiring to the vehicle bulb. may DISABLE the rear vehicle lamps
or cause them not to function properly.
Contact your authorized dealer as soon as possible for proper
instructions and equipment for hooking-up trailer lamps.
Driving while you tow
When towing a trailer:
•Do not drive faster than 70 mph (113 km/h) during the first 500 miles
(800 km) of trailer towing and don’t make full-throttle starts.
•Turn off the speed control. The speed control may shut off
automatically when you are towing on long, steep grades.
•Use the grade assist feature (automatic transmissions) when towing.
This feature provides engine braking and helps eliminate excessive
shifting for optimum fuel economy and transmission cooling.
•Allow more distance for stopping with a trailer attached; anticipate
stops and brake gradually.
Tires, Wheels and Loading
200
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)
Page 213 of 348

When features of the AdvanceTrac
system are off, the stability control
off light will illuminate steadily.
Pressing the stability control button
again will turn off the stability
control off light.
In R (Reverse), ABS and the engine traction control and brake traction
control features will continue to function; however, ESC is disabled.
AdvanceTracFeatures
Button
functionsMode
icon
statusESC TCS
Default at
start-upOn during
bulb
checkEnabled Enabled
Button pressed
momentarilyTraction
control offOn Enabled Disabled
Button pressed
twice; brakes
appliedSport mode (if
equipped)On Enabled Enabled
Button pressed
and held more
than 5 seconds;
brakes applied;
no throttleAdvanceTrac
DisabledOn Disabled Disabled
Button pressed
again after
deactivationAdvanceTrac
fully enabledOff Enabled Enabled
AdvanceTracSport Mode (if equipped)
The AdvanceTracsystem provides an available sport mode on some
models. This can be selected utilizing the stability off button as shown in
the table above.
Sport mode is not intended for use on public roadways as this mode
provides less AdvanceTracsystem intervention than when the default
ESC and traction control systems are on. Sport mode will allow more
spirited driving while the AdvanceTracsystem is still enabled.
Driving
213
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)
Page 301 of 348

Readiness for Inspection/Maintenance (I/M) testing
Some state/provincial and local governments may have
Inspection/Maintenance (I/M) programs to inspect the emission control
equipment on your vehicle. Failure to pass this inspection could prevent
you from getting a vehicle registration. Your vehicle may not pass the I/M
test if the service engine soon
indicator is on or not working
properly (bulb is burned out), or if the OBD-II system has determined
that some of the emission control systems have not been properly
checked. In this case, the vehicle is considered not ready for I/M testing.
If the service engine soon
indicator is on or the bulb does not
work, the vehicle may need to be serviced. Refer toOn-board
diagnostics (OBD-II)in this chapter.
If the vehicle’s engine or transmission has just been serviced, or the
battery has recently run down or been replaced, the OBD-II system may
indicate that the vehicle is not ready for I/M testing. To determine if the
vehicle is ready for I/M testing, turn the ignition key to the on position
for 15 seconds without cranking the engine. If the service engine
soon
indicator blinks eight times, it means that the vehicle is not
ready for I/M testing; if the service engine soon
indicator stays on
solid, it means that the vehicle is ready for I/M testing.
The OBD-II system is designed to check the emission control system
during normal driving. A complete check may take several days. If the
vehicle is not ready for I/M testing, the following driving cycle consisting
of mixed city and highway driving may be performed:
15 minutes of steady driving on an expressway/highway followed by
20 minutes of stop-and-go driving with at least four 30-second idle
periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete. If
the vehicle is still not ready for I/M testing, the above driving cycle will
have to be repeated.
Maintenance and Specifications
301
2011 05+ Mustang(197)
Owners Guide, 1st Printing
USA(fus)