Ford 2003 Mustang Workshop Manual page 3397

Is the noise eliminated?
PINPOINT TEST C: CONTINUOUS SEEK/SCAN IN AM/FM
Test Step
C1 CHECK OPERATION OF THE
SEEK/SCAN FUNCTIONS
Key in ON position.
Operate the SEEK/SCAN functions
with the audio unit in both AM and FM
tuner modes.
Do the SEEK/SCAN functions
search continuously?
C2 CHECK ANTENNA FOR DAMAGE
Key in OFF position.
Disconnect: Antenna Lead Terminal.
Measure the resistance between the
antenna cable lead terminal and the
end of the antenna grid wire.
Is the resistance less than 8 ohms?
C3 SUBSTITUTE ANTENNA EXTENSION
CABLE
Substitute a known good antenna
cable between the audio unit and the
antenna.
Key in START position.
Check the operation of the audio unit.
Is the noise eliminated?
PINPOINT TEST D: NO SOUND FROM ONE OR MORE OF THE
SPEAKERS — NOT ALL SPEAKERS
D1 CHECK FOR SOUND
Key in ON position.
Turn on the audio unit.
Are all speakers without sound?
jumper cable. When noise is eliminated,
PROVIDE a permanent ground where
necessary. TEST the system for normal
operation.
Yes
GO to C2
No
The system is OK.
Yes
GO to C3
No
REPAIR the antenna. REFER to
Yes
INSTALL a new antenna extension cable. REFER
to Section 415-02
operation.
No
REINSTALL the original cable. REMOVE the
audio unit and SEND it to an authorized Ford
audio system repair facility. TEST the system for
normal operation.
Test Step
Result / Action to Take
.
.
Section 415-02
. TEST the system for normal
Result / Action to
Yes
GO to
Test E
No
For convertible,
GO to
For coupe, GO to
D4
Take
Pinpoint
.
D2 .
.