2003 FORD MUSTANG bulb

DIAGNOSIS AND TESTING
Stoplamps
Refer to Wiring Diagrams Cell
90 , Turn/Stop/Hazard Lamps for schematic and connector information.
Inspection and Verification 1. Verify the customer concerns.
2. Visually inspect for the following obvious signs of mechanical or electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, determine the symptom and refer to the Symptom Chart.
Symptom Chart SECTION 417-
01: Exterior Lighting 2003 Mustang Workshop Manual Special Tool(s)
73III Automotive Meter or
equivalent
105-
R0057
Visual Inspection Chart Mechanical Electrical
z
Brake pedal position (BPP) switch z
Central junction box (CJB) fuse 41 (15A)
z Circuitry
z Bulb(s)
Symptom Chart Condition
Possible Sources Action
z The stoplamps are
inoperative z
Central junction box (CJB)
fuse 41 (15A).
z Circuitry.
z Brake pedal position
(BPP) switch. z
Go To Pinpoint Test G .
z One or more stoplamps
are inoperative z
Circuitry.
z Multifunction switch. z
Go To Pinpoint Test H .
z The stoplamps are on
continuously z
Brake pedal position
(BPP) switch.
z Multifunction switch. z
Go To Pinpoint Test I . Klj . 1 ba
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DIAGNOSIS AND TESTING
Parking, Rear and License Lamps
Refer to Wiring Diagrams Cell
92 , Exterior for schematic and connector information.
Inspection and Verification 1. Verify the customer concern by operating the parking lamps.
2. Visually inspect for the following obvious signs of mechanical and electrical damage.
3. If the concern is not visually evident, determine the symptom and proceed to Symptom Chart.
Symptom Chart SECTION 417-
01: Exterior Lighting 2003 Mustang Workshop Manual Special Tool(s)
73 III Automotive Meter or
equivalent
105-
R0057
Visual Inspection Chart Mechanical Electrical
z
Damaged multifunction switch
(13K359)
z Damaged headlamp switch (11654) z
Blown battery junction box (BJB) Fuse 2
(30A)
z Damaged wiring harness
z Loose or corroded connections
z Damaged parking, rear or license lamp
Symptom Chart Condition
Possible Sources Action
z The parking, rear or license
lamps are inoperative z
BJB Fuse 2 (30A).
z Circuitry.
z Headlamp switch. z
GO to Pinpoint Test L .
z One or more parking, rear or
license bulbs(s) is inoperative z
Parking, rear or
license bulb(s).
z Circuitry. z
GO to Pinpoint Test M .
z The parking, rear or license
lamps are on continuously z
Headlamp switch.
z Circuitry. z
GO to Pinpoint Test N . Klj . 1 ba
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Pinpoint Tests
PINPOINT TEST O: THE FOG LAMPS ARE INOPERATIVE Condition
Possible Sources Action
z The fog lamps are
inoperative z
BJB Fuse 27 (20A).
z CJB Fuse 38 (20A).
z Circuitry.
z Fog lamp relay.
z Fog lamp interrupt
relay.
z Headlamp switch.
z Fog lamp switch.
z Multifunction switch. z
GO to Pinpoint Test O .
z The individual fog lamp is
inoperative z
Fog lamp bulb.
z Circuitry. z
GO to Pinpoint Test P .
z The fog lamps are on
continuously z
Fog lamp relay.
z Circuitry.
z Fog lamp switch. z
GO to Pinpoint Test Q .
Test Step Result / Action
to Take O1 CHECK THE PARK LAMPS
z
Place the headlamp switch in the PARK position.
z Place the multifunction switch in low beam position.
z Do the park lamps illuminate? Yes
Turn off the
headlamp switch.
GO to
O2 .
No
GO to Pinpoint Test L .
O2 CHECK THE FOG LAMP RELAYS
z
Disconnect: Fog Lamp Relay.
z Disconnect: Fog Lamp Interrupt Relay.
z Check the fog lamp relay and fog lamp interrupt relay; refer to Wiring
Diagrams Cell 149.
z Are the relays OK? Yes
GO to
O3 .
No
INSTALL new
relay(s). TEST
the system for
normal
operation. O3 CHECK THE CIRCUIT 12 (LG/BK)
z
Measure the voltage between fog lamp interrupt relay connector Pin 1,
Circuit 12 (LG/BK), harness side and ground. Yes
GO to
O4 .
No
REPAIR the
circuit. TEST the
system for
normal
operation. Klj . 2 ba
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DIAGNOSIS AND TESTING
Reversing Lamps
Refer to Wiring Diagrams Cell
93 , Backup Lamps for schematic and connector information.
Inspection and Verification 1. Verify the customer concern by operating the reversing lamps.
2. Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:
3. If the concern is not visually evident, determine the symptom and proceed to Symptom Chart.
Symptom Chart SECTION 417-
01: Exterior Lighting 2003 Mustang Workshop Manual Special Tool(s)
73III Automotive Meter or
equivalent
105-
R0057
Visual Inspection Chart Mechanical Electrical
z
Damaged digital transmission range (DTR)
sensor (automatic transmission [A/T])
z Damaged reversing lamp switch (manual
transmission [M/T]) z
Blown central junction box (CJB)
Fuse 11 (15A)
z Damaged wiring harness
z Loose or corroded connections
z Damaged reversing lamp
z Damaged DTR sensor (automatic
transmission [A/T])
z Damaged reversing lamp switch
(manual transmission [M/T])
Symptom Chart Condition
Possible Sources Action
z The reversing lamps are
inoperative z
CJB Fuse 11 (15A).
z Bulbs.
z Circuitry.
z DTR sensor (A/T).
z Reversing lamp
switch (M/T). z
GO to Pinpoint Test R . Klj . 1 ba
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Pinpoint Tests
PINPOINT TEST R: THE REVERSING LAMPS ARE INOPERATIVE z
The individual reversing lamp
is inoperative z
Bulb.
z Circuitry. z
GO to Pinpoint Test S .
z The reversing lamps are on
continuously z
Circuitry.
z DTR sensor (A/T).
z Reversing lamp
switch (M/T). z
GO to Pinpoint Test T .
Test Step Result / Action to Take
R1 CHECK THE VOLTAGE TO THE DTR SENSOR (A/T) OR
THE REVERSING LAMP SWITCH (M/T) z
Key in OFF position.
z Disconnect: DTR Sensor C167 (A/T).
z Disconnect: Reversing Lamp Switch C169 (M/T).
z Key in ON position.
z If equipped with A/T, measure the voltage between DTR
sensor C167 Pin 9, Circuit 1087 (OG), harness side and
ground.
z If equipped with M/T, measure the voltage between
reversing lamp switch C169, Circuit 1087 (OG), harness
side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
R2 .
No
REPAIR the circuit. TEST the
system for normal operation. R2 CHECK CIRCUIT 140 (BK/PK) FOR OPEN
z
Key in OFF position.
z If equipped with A/T, measure the resistance between
DTR sensor C167 Pin 11, Circuit 140 (BK/PK), harness
side and ground. Yes
INSTALL a new DTR sensor
(A/T) or reversing lamp switch
(M/T); REFER to
Section 307 -
01 ,
Section 308 - 03A or
Section 308 - 03B . TEST the Klj . 2 ba
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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.
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REMOVAL AND INSTALLATION
Lamp Assembly —
Fog Lamp (GT)
Removal 1. Raise and support the vehicle.
2. Remove the screw.
3. Partially lower the vehicle and remove the fog lamp assembly. 1. Disconnect the electrical connector.
2. Remove the two screws.
3. Remove the fog lamp assembly and replace the bulb if necessary.
Installation 1. NOTE: Be sure the fascia clip is correctly installed on the bottom side of the fog lamp assembly
bracket.
To install, reverse the removal procedure.
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REMOVAL AND INSTALLATION
Lamp Assembly —
Rear
Removal 1. Position the luggage compartment trim aside. zRemove the two retainers.
2. Remove the four rear lamp nuts.
3. Remove the rear lamp assembly, disconnect the electrical connectors and replace the bulbs if necessary.
Installation 1. To install, reverse the removal procedure.
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