horn FORD MUSTANG 2003 Owner's Manual

normal operation.
E4 CHECK THE GEM OUTPUT TO THE HORN
z
Connect the diagnostic tool.
z Trigger the GEM active command HORN ON and OFF.
z Did the horn sound and turn off? Yes
GO to
E5 .
No
GO to E6 .
E5 CHECK THE GEM OUTPUT TO THE PARKING LAMPS
z
Connect the diagnostic tool.
z Trigger the GEM active command PARKLAMPS ON and
OFF.
z Did the parking lamps illuminate and turn off? Yes
INSTALL a new GEM. For
additional information,
REFER to
Section 419 -
10 . REPEAT the self-
test.
CLEAR the DTCs.
No
GO to E10 .
E6 CHECK CIRCUIT 6 (YE/LG) FOR SHORT TO POWER
z
Disconnect: Horn Relay.
z Disconnect: GEM C201c.
z Measure the voltage between GEM C201c Pin 12, Circuit 6
(YE/LG), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
E7 .
No
REPAIR Circuit 6 (YE/LG).
REPEAT the self- test.
CLEAR the DTCs. E7 CHECK CIRCUIT 6 (YE/LG) FOR SHORT TO GROUND
z
Measure the resistance between GEM C201c Pin 12, Circuit
6 (YE/LG), harness side and ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
E8 .
No
REPAIR Circuit 6 (YE/LG).
REPEAT the self- test.
CLEAR the DTCs. E8 CHECK CIRCUIT 6 (YE/LG) FOR OPEN
z
Measure the resistance between GEM C201c Pin 12, Circuit
6 (YE/LG), harness side and horn relay Pin 1, Circuit 6
(YE/LG), harness side. Yes
GO to
E9 .
No
REPAIR Circuit 6 (YE/LG).
REPEAT the self- test.
CLEAR the DTCs. Klj . 19 ba
212003 Mustang Workshop Manual
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z
Is the resistance less than 5 ohms? E9 CHECK THE HORN FOR NORMAL OPERATION
z
Depress the steering wheel horn switch.
z Did the horn sound? Yes
INSTALL a new GEM. For
additional information,
REFER to
Section 419 -
10 . REPEAT the self-
test.
CLEAR the DTCs.
No
REFER to Section 413 -
06 .
E10 CHECK CIRCUIT 1032 (WH/BK) FOR SHORT TO POWER
z
Disconnect: Parking Lamp Relay.
z Disconnect: GEM C201e.
z Measure the voltage between GEM C201e Pin 11, Circuit
1032 (WH/BK), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
E11 .
No
REPAIR Circuit 1032
(WH/BK). REPEAT the
self- test. CLEAR the
DTCs. E11 CHECK CIRCUIT 1032 (WH/BK) FOR SHORT TO GROUND
z
Measure the resistance between GEM C201e Pin 11, Circuit
1032 (WH/BK), harness side and ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
E12 .
No
REPAIR Circuit 1032
(WH/BK). REPEAT the
self- test. CLEAR the
DTCs. E12 CHECK CIRCUIT 1032 (WH/BK) FOR OPEN
z
Measure the resistance between GEM C201e Pin 11, Circuit Yes Klj . 20 ba
212003 Mustang Workshop Manual
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6. If the DTCs retrieved are related to the concern, go to GEM Diagnostic Trouble Code (DTC)
Index to continue diagnostics.
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics.
GEM Diagnostic Trouble Code (DTC) Index GEM Diagnostic Trouble Code (DTC) Index DTC Description Source Action
B1217 Horn Relay Coil Circuit Failure GEM REFER to
Section 413 - 06 .
B1218 Horn Relay Coil Circuit Short to
Vbatt GEM REFER to
Section 413 - 06 .
B1312 Lamp Headlamp Input Circuit
Short to Battery GEM REFER to
Section 417 - 01 .
B1317 Battery Voltage High GEM REFER to
Section 414 - 00 .
B1318 Battery Voltage Low GEM REFER to
Section 414 - 00 .
B1322 Driver Door Ajar Circuit Short to
Ground GEM REFER to
Section 417 - 02 .
B1330 Passenger Door Ajar Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1334 Decklid Ajar Rear Door Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1339 Chime Input Request Circuit
Short to Battery (FOJ) GEM REFER to
Section 413 - 09 .
B1340 Chime Input Request Circuit
Short to Ground GEM REFER to
Section 413 - 09 .
B1342 ECU Is Defective GEM CLEAR the DTCs. Retrieve the DTCs. If DTC
B1342 is retrieved, INSTALL a new GEM. REFER to Section 419 - 10 .
B1353 Ignition Key-
In Circuit Open GEM REFER to
Section 413 - 09 .
B1359 Ignition Run/Acc Circuit Failure GEM REFER to
Section 211 - 05 .
B1396 Power Door Lock Circuit Short
to Battery GEM REFER to
Section 501 - 14B .
B1397 Power Door Unlock Circuit
Short to Battery GEM REFER to
Section 501 - 14B .
B1405 Driver Power Window Down
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1408 Driver Power Window Up Circuit
Short to Battery GEM REFER to
Section 501 - 11 .
B1410 Driver Power Window Motor
Circuit Failure GEM REFER to
Section 501 - 11 .
B1426 Lamp Safety Belt Circuit Short
to Battery GEM REFER to
Section 413 - 01 .
B1428 Lamp Safety Belt Circuit Failure GEM REFER to
Section 413 - 01 .
B1431 Wiper Brake/Run Relay Circuit
Failure GEM GO to
Pinpoint Test B .
B1432 Wiper Brake/Run Relay Circuit GEM GO to
Pinpoint Test B . Klj . 3 ba
202003 Mustang Workshop Manual
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Fuse/Relay BlockPower Distribution
Fusible LinksPower Distribution; Generators & Regulators;
Starters
GeneratorGenerators & Regulators; Engine Performance;
Power Distribution
Generic Electronic Module (GEM)Body Control Modules; Electronic Suspension
Glow Plug RelayEngine Performance
Glow PlugsEngine Performance
GroundsGround Distribution
Headlight Door ModuleHeadlight Doors
Headlight RelayHeadlight Systems; Daytime Running Lights
HeadlightsHeadlight Systems; Daytime Running Lights
Heated Oxygen Sensor(s) (HO2S)Engine Performance
Heated Windshield Control ModuleHeated Windshields
Height SensorElectronic Suspension
HornsSteering Column Switches
Horn RelaySteering Column Switches
Idle Air Control (IAC) Motor/ValveEngine Performance
Ignition Coil(s)Engine Performance
Ignition Key Lock CylinderAnti-Theft System
Ignition ModuleEngine Performance
Ignition SwitchPower Distribution; Engine Performance; Generators & Regulators; Starters
Illuminated Entry ModuleIllumination/Interior Lights
Illumination LightsIllumination/Interior Lights
Impact SensorAir Bag Restraint System
Inertia Fuel Shutoff SwitchEngine Performance
Inhibit RelayStarters
Instrument ClusterAnalog Instrument Panels
Intake Air Temperature (IAT) SensorEngine Performance
Interior LightsIllumination/Interior Lights
Interlock SwitchStarters
Junction BlockPower Distribution
Keyless Entry ReceiverRemote Keyless Entry
Key Reminder SwitchStarters
Knock SensorEngine Performance
Lamp Control ModuleExterior Lights
License Plate LampExterior Lights
Lighting Control ModuleLighting Control Modules; Anti-Theft System; Daytime Running Lights; Headlight Systems
Lower RelayPower Convertible Top
Malfunction Indicator Light (MIL)Engine Performance; Instrument Panels
Manifold Absolute Pr essure (MAP) SensorEngine Performance
Mass Airflow (MAF) SensorEngine Performance


111
15 ноября 2011 г. 20:18:43Page 7 © 2006 Mitchell Repair Information Company, LLC.

Fig. 27: Headlights Circuit
HORN

2003 Ford Mustang
2003 SYSTEM WIRING DIAGRAMS Ford - Mustang
111
18 ноября 2011 г. 12:45:09Page 28 © 2006 Mitchell Repair Information Company, LLC.

Fig. 28: Horn Circuit
INSTRUMENT CLUSTER

2003 Ford Mustang
2003 SYSTEM WIRING DIAGRAMS Ford - Mustang
111
18 ноября 2011 г. 12:45:09Page 29 © 2006 Mitchell Repair Information Company, LLC.

Fig. 27: Headlights Circuit
HORN

2003 Ford Mustang GT
2003 SYSTEM WIRING DIAGRAMS Ford - Mustang
111
18 ноября 2011 г. 12:50:34Page 28 © 2006 Mitchell Repair Information Company, LLC.

Fig. 28: Horn Circuit
INSTRUMENT CLUSTER

2003 Ford Mustang GT
2003 SYSTEM WIRING DIAGRAMS Ford - Mustang
111
18 ноября 2011 г. 12:50:34Page 29 © 2006 Mitchell Repair Information Company, LLC.

Fig. 27: Headlights Circuit
HORN

2003 Ford Mustang Cobra
2003 SYSTEM WIRING DIAGRAMS Ford - Mustang
111
18 ноября 2011 г. 12:47:06Page 28 © 2006 Mitchell Repair Information Company, LLC.

Fig. 28: Horn Circuit
INSTRUMENT CLUSTER

2003 Ford Mustang Cobra
2003 SYSTEM WIRING DIAGRAMS Ford - Mustang
111
18 ноября 2011 г. 12:47:06Page 29 © 2006 Mitchell Repair Information Company, LLC.