FORD MUSTANG 2003 Workshop Manual

z
Is the voltage greater than 10 volts? No
REPAIR the circuit. TEST
the system for normal
operation.
V3 CHECK RUN/START POWER SUPPLY TO THE
INSTRUMENT CLUSTER z
Key in OFF position.
z Disconnect: Instrument Cluster C220b.
z Key in ON position.
z Measure the voltage between the instrument cluster C220b
pin 12, circuit 20 (WH/LB), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
V4 .
No
REPAIR the circuit. TEST
the system for normal
operation. V4 CHECK GROUND CIRCUIT 397 (BK/WH) FOR AN OPEN
z
Key in OFF position.
z Measure the resistance between the instrument cluster
C220b pin 20, circuit 397 (BK/WH), harness side and
ground.
z Is the resistance less than 5 ohms? Yes
GO to
V5 .
No
REPAIR the circuit. TEST
the system for normal
operation. V5 CHECK GROUND CIRCUIT 1205 (BK) FOR OPEN
z
Measure the resistance between the instrument cluster
C220b pin 1, circuit 1205 (BK), harness side and ground. Yes
GO to
V6 .
No
REPAIR the circuit. TEST
the system for normal
operation. Klj . 39 ba
412003 Mustang Workshop Manual
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PINPOINT TEST W: NO COMMUNICATION WITH THE GENERIC
ELECTRONIC MODULE (GEM) z
Is the resistance less than 5 ohms? V6 CHECK FOR CORRECT INSTRUMENT CLUSTER
OPERATION z
Disconnect all instrument cluster connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all instrument cluster connectors and make sure
they seat correctly.
z Operate the system and verify the concern is still present.
z Is the concern still present? 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. Test Step Result / Action to Take
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to
use the correct probe adapter(s) may damage the connector. W1 CHECK THE GENERIC ELECTRONIC MODULE (GEM)
POWER SUPPLY z
Key in OFF position.
z Disconnect: Generic Electronic Module (GEM) C201a.
z Disconnect: GEM C201b.
z Key in ON position.
z Using the following table, measure the voltage between the
GEM, harness side and ground.
z Are the voltages greater than 10 volts? Connector Pin Circuit
C201a 4 400 (LB/BKK)
C201a 1 1006 (DG/WH)
C201b 2 1001 (WH/YE)
C201b 3 193 (YE/LG) Yes
GO to
W2 .
No
REPAIR the circuit(s) in
question. TEST the system
for normal operation. W2 CHECK THE GEM GROUND CIRCUIT 397 (BK/WH) FOR Klj . 40 ba
412003 Mustang Workshop Manual
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OPEN
z
Key in OFF position.
z Measure the resistance between the GEM C201b pin 4,
circuit 397 (BK/WH), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
W3 .
No
REPAIR the circuit(s) in
question. TEST the system
for normal operation. W3 CHECK CIRCUIT 397 (BK/WH) FOR SHORT TO POWER
z
Measure the voltage between the GEM C201b pin 4, circuit
397 (BK/WH), harness side and ground.
z Is any voltage present? Yes
REPAIR the circuit. TEST
the system for normal
operation.
No
REFER to
Section 418 - 00 . Klj . 41 ba
412003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Instrument Cluster
Removal and Installation
All vehicles
1. CAUTION: Electronic modules are sensitive to electrical charges. If exposed to
these charges, damage may result.
Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Remove the headlamp switch knob. zPull out the headlamp switch knob and insert a thin tool in the slot to release the knob
from the shaft.
3. Remove the screws and remove the instrument cluster finish panel. 4. Remove the screws and pull the instrument cluster forward to expose the electrical connector. SECTION 413-
01: Instrument Cluster 2003 Mustang Workshop Manual Klj . 1 ba
32003 Mustang Workshop Manual
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Cobra only
5. Disconnect the electrical connectors and boost pressure line and remove the instrument cluster.
Except Cobra 6. Disconnect the electrical connectors and remove the instrument cluster.
All vehicles 7. To install, reverse the removal procedure. Klj . 2 ba
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Klj . 3 ba
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REMOVAL AND INSTALLATION
Warning Indicator Bulb
Removal and Installation
1. Remove the instrument cluster. Refer to Instrument Cluster in this section.
2. Remove the necessary instrument cluster bulbs by rotating one quarter turn counterclockwise.
3. To install, reverse the removal procedure.
SECTION 413-
01: Instrument Cluster 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Instrument Cluster Lens
Removal and Installation
1. Remove the instrument cluster. Refer to Instrument Cluster in this section.
2. Remove the screws and remove the instrument cluster lens.
3. To install, reverse the removal procedure.
SECTION 413-
01: Instrument Cluster 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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SPECIFICATIONS
SECTION 413-
06: Horn 2003 Mustang Workshop Manual Torque Specifications
Description Nm lb-
ft lb-
in Horn retaining screw 10 — 89
Horn switch retaining bolts 5 — 40
Driver side air bag module retaining screws 12 9 — Klj . 1 ba
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DESCRIPTION AND OPERATION
Horn
The horn system consists of the following:
zdual horns (one high-pitched, one low- pitched)
z horn switch (located underneath the driver side air bag module [043B13]).
z horn relay (located in the central junction box [CJB]).
SECTION 413-
06: Horn 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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