Ford 2003 Mustang Workshop Manual page 3295

Key in OFF position.
Disconnect: Generator C102c.
Key in ON position.
Does the charging system indicator illuminate?
P6 CHECK CIRCUIT 904 (LG/RD) FOR SHORT TO GROUND
Key in OFF position.
Measure the resistance between the generator C102c pin 1,
circuit 904 (LG/RD), harness side and ground.
Is the resistance greater than 10,000 ohms?
P7 CHECK FOR CORRECT INSTRUMENT CLUSTER
OPERATION
Disconnect all instrument cluster connectors.
Check for:
corrosion
pushed-out pins
Connect all instrument cluster connectors and make sure
they seat correctly.
Operate the system and verify the concern is still present.
Is the concern still present?
PINPOINT TEST Q: THE HIGH BEAM INDICATOR IS
NEVER/ALWAYS ON
Q1 CHECK THE HIGH BEAM LAMP OPERATION
CAUTION: Use the correct probe adapter(s) when
making measurements. Failure to use the correct probe
adapter(s) may damage the connector.
Key in ON position.
Operate the high beams.
Do the high beams operate correctly?
Q2 CHECK CIRCUIT 932 (GY/WH) AND CIRCUIT 12 (LG/BK)
FOR AN OPEN
Test Step
Yes
GO to P6 .
No
INSTALL a new generator.
REFER to Section 414-02
TEST the system for normal
operation.
Yes
GO to P7 .
No
REPAIR the circuit. TEST
the system for normal
operation.
Yes
INSTALL a new instrument
cluster. REFER to
Instrument Cluster in this
section. TEST the system
for normal operation.
No
The system is operating
correctly at this time.
Concern may have been
caused by a loose or
corroded connector.
CLEAR the DTCs. REPEAT
the self-test.
Result / Action to Take
Yes
GO to Q2 .
No
REFER to Section 417-01
.
.