Ford 2003 Mustang Workshop Manual page 3395

Are the resistances less than 5 ohms?
PINPOINT TEST B: POOR RECEPTION
Test Step
B1 CHECK ANTENNA CABLE
CONNECTIONS
Key in OFF position.
Check the antenna connections
including the extension cable.
Check to make sure the antenna is
securely mounted to the vehicle body
at ground points.
Are the connections clean, secure,
and in metal-to-metal contact?
B2 CHECK SUPPRESSION
EQUIPMENT/MOUNTING AND
CONNECTING CIRCUITS
Check all necessary suppression
equipment and the radio frequency
interference suppression bond. Refer
to Section 415-01
Check the radio receiver hood bonding
strap and the body-to-chassis straps
for integrity, cleanliness, and metal-to-
metal contact.
NOTE: The capacitor mounting points
are used to complete the electrical
circuit and must be mounted securely
to clean surfaces.
Check the mounting and connecting
circuits of the radio ignition interference
capacitor for integrity, cleanliness, and
metal-to-metal contact.
Are the connections clean, secure,
and in metal-to-metal contact?
B3 CHECK RADIO IGNITION
INTERFERENCE CAPACITOR
Check the operation of the radio
ignition interference capacitor by
substituting it with a known good
component.
Key in START position.
Turn the audio unit on and check the
radio reception.
Yes
GO to
No
CLEAN and SECURE the antenna connections
as necessary. TEST the system for normal
operation.
Yes
GO to
No
.
CLEAN, SECURE, or INSTALL new suppression
equipment as necessary. TEST the system for
normal operation.
Yes
INSTALL a new radio ignition interference
capacitor. TEST the system for normal operation.
No
GO to
system for normal
operation.
No
REPAIR the circuit
(s) in question. TEST
the system for
normal operation.
Result / Action to Take
B2 .
B3 .
B4 .