warning light FORD MUSTANG 2003 Service Manual

REMOVAL AND INSTALLATION
Battery Tray
Removal and Installation
WARNING: Batteries normally produce explosive gases which can cause personal injury.
Therefore, do not allow flames, sparks or lighted substances to come near the battery. When
charging or working near a battery, always shield your face and protect your eyes. Always
provide ventilation. Failure to follow these instructions may result in personal injury.
WARNING: Keep out of the reach of children. Batteries contain sulfuric acid. Avoid
contact with skin, eyes, or clothing. Also, shield your eyes when working near the battery to
protect against possible splashing of the acid solution. In case of acid contact with skin or
eyes, flush immediately with water for a minimum of 15 minutes and get prompt medical
attention. If acid is swallowed, call a physician immediately. Failure to follow these instructions
may result in personal injury.
1. Remove the battery. For additional information, refer to Battery in this section.
2. Remove the battery tray bolts and washers.
3. Remove the battery tray.
4. NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms
may occur while the vehicle relearns its adaptive strategy. The vehicle needs to be driven to
relearn the strategy.
To install, reverse the removal procedure.
SECTION 414-
01: Battery, Mounting and Cables 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Battery Cables
Removal
WARNING: Batteries normally produce explosive gases which can cause personal injury.
Therefore, do not allow flames, sparks or lighted substances to come near the battery. When
charging or working near a battery, always shield your face and protect your eyes. Always
provide ventilation. Failure to follow these instructions may result in personal injury.
WARNING: Keep out of the reach of children. Batteries contain sulfuric acid. Avoid
contact with skin, eyes, or clothing. Also, shield your eyes when working near the battery to
protect against possible splashing of the acid solution. In case of acid contact with skin or
eyes, flush immediately with water for a minimum of 15 minutes and get prompt medical
attention. If acid is swallowed, call a physician immediately. Failure to follow these instructions
may result in personal injury.
All vehicles
1. Remove the battery. For additional information, refer to Battery in this section.
2. If equipped, unplug the engine heater intermediate connection.
3. Remove the battery ground cable harness bolt from the radiator support and release the cable harness locators.
4. Disconnect the battery cable harness electrical connectors.
5. CAUTION: The square terminal from the battery must be installed first, followed by
SECTION 414-
01: Battery, Mounting and Cables 2003 Mustang Workshop Manual Klj . 1 ba
62003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Bulb —
Headlamp
Removal
WARNING: The halogen bulb contains gas under pressure. The bulb may shatter if the
glass envelope is scratched or if the bulb is dropped. Handle the bulb only by its base. Grasp
the bulb only by its base. Avoid touching the glass envelope.
NOTE: The headlamp bulb should not be removed from the headlamp until just before a replacement
bulb is installed. Removing the bulb for an extended period of time may effect headlamp bulb
performance. Contaminants may enter the headlamp where they can settle on the lens and reflector.
Never turn on the headlamps with the bulb removed.
1. Remove the headlamp assembly. For additional information, refer to Lamp Assembly —
Headlamp .
2. Rotate the headlamp bulb retainer counterclockwise.
3. Remove the headlamp bulb and retainer. zGrasp the headlamp bulb by its base and remove the bulb.
Installation 1. WARNING: The halogen bulb contains gas under pressure. The bulb may shatter if
the glass envelope is scratched or if the bulb is dropped. Handle the bulb only by its
base. Grasp the bulb only by its base. Avoid touching the glass envelope.
To install, reverse the removal procedure.
SECTION 417-
01: Exterior Lighting 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

Symptom Chart
Pinpoint Tests
CAUTION: Before removing and installing the GEM or its connectors, disconnect the Output Circuit Failure
B2488 RF Side Repeater Lamp
Output Circuit Failure GEM REFER to
Section 417 - 01 .
C1189 Brake Fluid Level Sensor
Input Short Circuit to Ground GEM REFER to
Section 413 - 01 .
C1223 Lamp Brake Warning
Output Circuit Failure GEM REFER to
Section 413 - 01 .
C1225 Lamp Brake Warning
Output Circuit Short to
Battery GEM REFER to
Section 413 - 01 .
Symptom Chart Condition
Possible Sources Action
z No communication with the generic
electronic module z
CJB Fuse 39
(5A)
z GEM.
z Circuitry. z
GO to
Pinpoint Test A .
z The courtesy lamps are inoperative zCJB Fuse 7
(20A).
z Door ajar switch
(es).
z Courtesy lamp
assemblies.
z Circuitry.
z GEM.
z Ignition Switch.
z Headlamp
Switch. z
GO to
Pinpoint Test B .
z The demand lighting is inoperative zCJB Fuse 7
(20A).
z Circuitry.
z GEM.
z Door ajar switch
(es).
z Demand lamp
assemblies.
z Ignition Switch.
z Headlamp
Switch. z
GO to
Pinpoint Test C .
z The illuminated entry is inoperative
when using the remote transmitter z
Remote
transmitter.
z GEM. z
GO to
Pinpoint Test D .
z The battery saver does not
deactivate after timeout z
Circuitry.
z GEM. z
GO to
Pinpoint Test E . Klj . 5 ba
162003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

DESCRIPTION AND OPERATION
Module Controlled Functions
The generic electronic module (GEM)(14B205) is the only multifunction control module on this vehicle.
The GEM controls the following functions:
zwarning chimes and warning lamps
z one- touch down window
z windshield washers and wipers
z battery saver
z illuminated entry with keyless remote entry
z interior lighting
SECTION 419-
10: Multifunction Electronic Control Modules 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

B1450 Wiper Wash/delay Switch
Circuit Failure GEM GO to
Section 501 - 16 .
B1453 Wiper Wash/delay Switch
Circuit Short to Ground GEM GO to
Section 501 - 16 .
B1458 Wiper Washer Pump Motor
Relay Circuit Failure GEM GO to
Section 501 - 16 .
B1460 Wiper Washer Pump Motor
Relay Circuit Short to Battery GEM GO to
Section 501 - 16 .
B1462 Safety Belt Switch Circuit
Failure GEM GO to
Section 413 - 09 .
B1466 Wiper High/low Speed Not
Switching GEM GO to
Section 501 - 16 .
B1473 Wiper Low Speed Circuit
Motor Failure GEM GO to
Section 501 - 16 .
B1476 Wiper High Speed Circuit
Motor Failure GEM GO to
Section 501 - 16 .
B1498 Decklid Punch-
out Sensor
Ground Short GEM GO to
Section 419 - 01 .
B1551 Decklid Release Circuit
Failure GEM GO to
Section 501 - 14B .
B1553 Decklid Release Circuit Short
to Battery GEM GO to
Section 501 - 14B .
B1555 Ignition RUN/START Circuit
Failure GEM GO to
Section 211 - 05 .
B1603 Lamp Anti-
Theft Indicator
Circuit Failure GEM GO to
Section 419 - 01 .
B1605 Lamp Anti-
Theft Indicator
Circuit Short to Battery GEM GO to
Section 419 - 01 .
B1687 Lamp Dome Input Circuit
Short to Battery GEM GO to
Section 417 - 02 .
B1833 Door Unlock Disarm Switch
Circuit Short to Ground GEM GO to
Section 419 - 01 .
B2486 Parklamp Output Relay Driver
Circuit Failure GEM GO to
Section 419 - 01 .
B2488 Parklamp Output Relay Driver
Circuit Short to Battery GEM GO to
Section 419 - 01 .
C1189 Brake Fluid Level Sensor
Input Circuit Short to Ground GEM REFER to
Section 413 - 01 .
C1223 Lamp Brake Warning Output
Circuit Failure GEM REFER to
Section 413 - 01 .
C1225 Lamp Brake Warning Output
Circuit Short to Battery GEM REFER to
Section 413 - 01 .
ICM DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC Description Source Action
B1343 Heated Backlight Input Circuit Failure ICM GO to
Pinpoint Test H . Klj . 4 ba
322003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

z
If the driver safety belt is buckled while the warning indicator is illuminated and the reminder
chime is sounding, then the safety belt warning indicator and reminder chime turn off.
z If the driver safety belt is buckled before the ignition switch is turned to ON, then the safety belt
warning light will turn on for 3 seconds and then off. The indicator chime will remain off.
Belt Minder (if equipped)
The Belt Minder feature is a supplemental warning to the safety belt warning function. This feature
provides additional reminders to the driver that the driver's safety belt is unbuckled by intermittently
sounding a chime and illuminating the safety belt warning lamp in the instrument cluster.
Safety Belt Extension
A safety belt that is too short even when fully extended can be lengthened. The safety belt extension
(611C22) is available. This assembly will add approximately 20 cm (8 inches) to the length of the
safety belt. Use the safety belt extension only if the safety belt is too short when fully extended. Do not
use the safety belt extension to alter the fit of the shoulder belt across the torso. Safety belt extensions
are available at no cost from any authorized Ford or Lincoln- Mercury dealer.
Lower Anchors and Tethers for Children (LATCH)
The lower anchors and tethers for children (LATCH) system is a standarized and uniform attachment
system for installing child safety seats in passenger vehicles. LATCH- equipped child safety seats have
two lower attachments that connect to the vehicle portion of the LATCH system.
The vehicle portion of the system consists of two attachment points (6- mm wires) bolted to the floor
pan at both second row outboard seating positions. The attachment points protrude from the biteline
between the seat cushion and seat backrest.
If a child safety seat was in use during a collision, inspect the vehicle portion of the system for
damage. If any of the attachment points (6- mm wires) are damaged, a new one must be installed. See
the appropriate removal and installation procedure in this section for service.
Attaching Safety Seats with Tether Straps
Some manufacturers make child safety seats that include a tether strap that goes over the back of the
vehicle seat and attaches to an anchoring point. Other manufacturers offer the tether strap as an
accessory. Contact the manufacturer of the child safety seat for information about ordering a tether
strap. If... Then...
The driver's safety belt is not buckled
approximately 5 seconds after the safety
belt warning light has turned off... The Belt Minder feature is activated —
the safety belt
warning light illuminates and the warning chime sounds for
6 seconds every 30 seconds, repeating for approximately
5 minutes or until safety belt is buckled. The driver's safety belt is buckled while
the safety belt indicator light is
illuminated and the safety belt warning
chime is sounding... The Belt Minder feature will not activate.
The driver's safety belt is buckled before
the ignition switch is turned to the ON
position... The Belt Minder feature will not activate. Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

Functional Test III (System Road Test Inspection)
1. NOTE: If the RH or the rear safety belts are to be tested, the assistance of a passenger is
required.
Fasten the safety belts and proceed to a safe area.
2. Attain a speed of 8 km/h (5 mph).
3. WARNING: The driver and passenger must be prepared to brace themselves if the
retractor does not lock.
Test the safety belts. 1. Grasp the shoulder harness and prepare to lean forward.
2. WARNING: The maximum brake application should be on dry concrete or
equivalent hard surface, NEVER on wet pavement or gravel.
WARNING: The driver and passenger must be prepared to brace themselves
in the event the retractor does not lock.
Make a maximum brake application without a skid.
3. NOTE: Do not jerk on the safety belt webbing when carrying out this test. Lean forward slightly when the brake application is made.
4. The safety belts should lock up with minimum webbing extension.
5. If there is a lockup of both shoulder straps, the safety belt assemblies are functioning correctly. Should either or both retractors fail to lock up at the 8 km/h (5 mph) speed, repeat the test at a
constant 24 km/h (15 mph) speed. (This test must be carried out with the assistance of a RH
front or rear passenger if the RH front or rear safety belts are to be tested).
6. CAUTION: Before installing a new safety belt assembly, inspect the mounting area
for damage and distortion. If the retractor of a new safety belt assembly has been bolted
into a damaged or distorted mounting area, the retractor could be warped and may not
function. If this is the case, remove the retractor and return the sheet metal to the
original configuration and install another complete safety belt assembly.
If the retractors do not lock up at the 24 km/h (15 mph) test, return the vehicle for service of
malfunctioning safety belts.
Functional Test IV (Automatic Locking Retractor) WARNING: After any vehicle collision, the safety belt system at all outboard seating
positions (except driver, which has no "automatic locking retractor" feature) must be checked
by a qualified technician to verify that the "automatic locking" feature for child seats is still
functioning correctly, in addition to other checks for correct safety belt system function. A new
safety belt and retractor assembly must be installed if the safety belt assembly's "automatic
locking retractor" feature or any other safety belt function is not operating correctly when
checked according to the procedures in the workshop manual. Failure to install a new safety
belt and retractor assembly could increase the risk of injury in collisions.
1. Position the seat back into the full up position. Klj . 3 ba
42003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

steering column.
4. WARNING: Carry a live air bag module with the air bag and trim cover pointed away
from your body. This will reduce the risk of injury in the event of an accidental
deployment.
Install the driver air bag module. Refer to Driver Air Bag Module in this section.
5. WARNING: The restraint system diagnostic tool is for restraint system service only.
Remove from vehicle prior to road use. Failure to remove could result in injury and
possible violation of vehicle safety standards.
Remove the restraint system diagnostic tool from the vehicle harness connector at the
passenger air bag module.
6. Connect the passenger air bag module electrical connector.
7. Reconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
8. Prove out the system.
Prove Out Procedure
Turn the ignition switch from the OFF to the RUN position and visually monitor the air bag indicator
with the air bag modules or restraint system diagnostic tools installed. The air bag indicator will light
continuously for approximately six seconds and then turn off. If an air bag supplemental restraint
system (SRS) fault is present, the air bag indicator will either: zfail to light.
z remain lit continuously.
z flash.
The flashing might not occur until approximately 30 seconds after the ignition switch has been turned
from the OFF to the RUN position. This is the time required for the restraints control module (RCM) to
complete the testing of the SRS. If the air bag indicator is inoperative and an SRS fault exists, a chime
will sound in a pattern of five sets of five beeps. If this occurs, the air bag indicator will need to be
repaired before diagnosis can continue.
Glossary
Restraint System Diagnostic Tool
Restraint system diagnostic tools are used to simulate air bag module connections to the system.
Disconnect the Component
Disconnect the component means disconnect the component vehicle harness connector. It does not
mean remove the component. Do not reconnect a disconnected component unless instructed to do so. Deactivate the System Klj . 4 ba
62003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

2.
WARNING: Incorrect centralization may result in premature component failure. If in
doubt when centralizing the clockspring, repeat the centralizing procedure. Failure to
follow this instruction may result in personal injury.
CAUTION: Make sure the road wheels are in the straight ahead position.
NOTE: If a clockspring has rotated out of center, follow through with this step.
Centralize the clockspring. 1. Hold the clockspring outer housing stationary.
2. Depress the clockspring locking tab to release the rotor.
3. CAUTION: Overturning will destroy the clockspring. The internal ribbon wire
acts as the stop and can be broken from its internal connection.
While holding the clockspring locking tab in the released position, turn the rotor
counterclockwise, carefully feeling for the ribbon wire to run out of length, and a slight
resistance is felt. Stop turning at this point.
4. While holding the clockspring locking tab in the released position, turn the clockspring
clockwise approximately three turns. This is the center point of the clockspring.
„Release the clockspring locking tab. Do not allow the rotor to turn from this
position.
All vehicles 3. NOTE: Slight turning of the clockspring rotor is allowable for alignment purposes to the steering
column.
With the flats of the clockspring aligned to the flats of the steering column, slide the clockspring
onto the steering column engaging the retaining tabs.
4. Route the clockspring wire harness down the side of the steering column and into the holders. Klj . 6 ba
112003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...