Ford 2003 Mustang Workshop Manual page 3391

SECTION 415-00: Entertainment System — General Information
DIAGNOSIS AND TESTING
Audio System
Refer to Wiring Diagrams Cell
Special Tool(s)
73III Automotive Meter
105-R0057 or equivalent
Inspection and Verification
1. Verify the customer concern by operating the electronic audio system with the engine running.
2. Visually inspect the following for obvious signs of mechanical and electrical damage.
Visual Inspection Chart
Audio unit
Antenna or antenna cable
Speakers mounting/speaker cones
Radio ignition interference capacitor, radio frequency
interference suppression bond or radio receiver hood bonding
strap cleanliness
3. If the concern remains and the fault is not detected, proceed to the Symptom Chart to continue
diagnostics.
Symptom Chart
Symptom Chart
Condition
The audio unit is
inoperative/does not operate
130 , Radio for schematic and connector information.
Mechanical
Possible Sources
Central
junction box
2003 Mustang Workshop Manual
Electrical
Battery junction box
(BJB) fuses:
3 (40A)
4 (40A)
6 (40A)
Central junction box
(CJB) fuses:
6 (20A)
27 (25A)
32 (15A)
Ignition switch
Circuitry
Audio unit
Action
Go To Pinpoint Test
A .