light FORD MUSTANG 2003 Workshop Manual

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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DIAGNOSIS AND TESTING
Fog Lamps
Refer to Wiring Diagrams Cell
86 , Fog Lamps for schematic and connector information.
Principles of Operation
The fog lamps will only illuminate when the low beam or parking lamps are illuminated. Voltage from
the parking lamp circuit is used to activate the fog lamp relay when the fog lamp switch is ON. Voltage
from the high beam headlamp circuit will activate the fog lamp interrupt relay. When the fog lamp
interrupt relay is active, the ground path is removed from the fog lamp relay, turning off the fog lamps.
Inspection and Verification 1. Verify the customer concern by operating the fog 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 headlamp switch (11654)
z Damaged fog lamp switch
z Damaged multifunction switch
(13K359) z
Blown battery junction box (BJB) Fuse 27
(20A)
z Blown central junction box (CJB) Fuse 38
(20A)
z Damaged wiring harness
z Loose or corroded connections
z Damaged fog lamp relay
z Damaged fog lamp interrupt relay
z Damaged fog lamp
Symptom Chart Klj . 1 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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GENERAL PROCEDURES
Headlamp Adjustment
Headlamp Aiming
1. The headlamp aiming procedure depends on the type of beam pattern the headlamp is equipped with. Vehicles may come equipped with visual optical right (VOR), visual optical left
(VOL), or SAE only (includes sealed beam type) headlamps. To identify the headlamp beam
pattern, look on the headlamp lens. Molded in small letters on the headlamp lens is one of the
following:
zSAE
z VOR or SAE
z VOL or SAE
2. Once the headlamp beam pattern is identified, aim the headlamps using one of the following methods as applicable.
zPhotometric aimers can aim SAE, VOR and VOL type headlamps. This is the preferred
method of headlamp aiming.
z Visual or screen method aiming can be used to aim SAE, VOR and VOL type
headlamps.
z Mechanical aimers can be used only with SAE type headlamps. Lamps that can be
aimed mechanically will have three nibs molded into the lens of the lamp.
Photometric Aiming 1. For the photometric aiming procedure, refer to the appropriate photometric headlamp aimer instruction manual.
Screen Method Aiming
All headlamp types
NOTE: Horizontal aim is not necessary for VOR or VOL headlamps.
NOTE: Consult your state vehicle inspection manual for recommended tolerance ranges for visual
aiming.
NOTE: The sight shield may need to be positioned or removed for access to the adjusters.
1. Before starting headlamp adjustment: zCheck the tire inflation.
z Check that no other load is in the vehicle other than a half tank of fuel.
z Check that the headlamps are clean.
z Check for correct headlamp operation.
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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 —
Headlamp
Removal 1. NOTE: Make sure that the headlamp switch and the ignition switch are in the OFF position.
Raise the headlamp retainers.
2. Remove the headlamp assembly. zDisconnect the electrical connectors and replace the lamp if necessary.
Installation 1. To install, reverse the removal procedure. zIf necessary, adjust the headlamps. For additional information, refer to Headlamp Adjustment in this section.
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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 —
Fog Lamp (Cobra)
Removal and Installation 1. Raise and support the vehicle. For additional information, refer to Section 100 - 02
2. Remove the fog lamp assembly.
1. Disconnect the electrical connector.
2. Remove the four screws.
3. 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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REMOVAL AND INSTALLATION
Lamp Switch —
Headlamp
Removal 1. Disconnect the battery ground cable.
2. Remove the headlamp switch knob. 1. Pull the headlamp switch knob out.
2. Insert a thin tool into the slot, pull and remove the headlamp switch knob.
3. Remove the instrument panel cluster finish panel. zRemove the screws and remove the finish panel.
4. Remove the headlamp switch. 1. Remove the screws.
2. Remove the switch.
3. Disconnect the electrical connectors.
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