Ford 2003 Mustang Workshop Manual page 3445

SECTION 417-01: Exterior Lighting
DIAGNOSIS AND TESTING
Headlamps
Refer to Wiring Diagrams Cell
Special Tool(s)
73III Automotive Meter or
equivalent
105-R0057
Inspection and Verification
1. Verify the customer concern by operating the headlamps.
2. Visually inspect for the following obvious signs of mechanical and electrical damage.
Visual Inspection Chart
Damaged headlamp switch (11654)
Damaged multifunction switch (13K359)
3. If the concern is not visually evident, determine the symptom and proceed to Symptom Chart.
Symptom Chart
Symptom Chart
Condition
Both
headlamps are
inoperative
The low beams
are inoperative
85 , Headlamps for schematic and connector information.
Mechanical
Possible Sources
Battery junction
box (BJB) fuse 2
(30A).
Headlamp
switch.
Circuitry.
Multifunction
switch.
Circuitry.
Multifunction
switch.
2003 Mustang Workshop Manual
Electrical
Battery junction box (BJB) fuse 2 (30A)
Central junction box (CJB) fuse(s):
38 (20A)
4 (7.5A) (RH)
10 (7.5A) (LH)
Damaged wiring harness
Loose or corroded connections
Headlamp bulb
Action
Go To Pinpoint Test A .
Go To Pinpoint Test B .