2003 FORD MUSTANG wiring

Item Part
Number Description
1 — Engine control sensor wiring 42 pin electrical
connector
2 — 16 pin electrical connector
3 — Engine control jumper harness electrical connector
4 — RH heated oxygen sensor (HO2S) electrical
connector
5 — Transmission main control harness electrical
connector.
6 — Fuel injector electrical connectors
7 — Heated positive crankcase ventilation (PCV) valve
electrical connector.
8 — Radio ignition interference capacitor electrical
connector
9 — Ignition coil electrical connectors
10 — Generator battery electrical connector
11 — Generator field electrical connector
12 — Engine coolant temperature (ECT) sensor
electrical connector
13 — Fuel pressure sensor electrical connector
14 — Exhaust vacuum regulator (EVR) electrical
connector
15 — Idle air control (IAC) electrical connector
16 — EGR backpressure transducer electrical connector
17 — Power distribution box battery feed electrical wire
18 — Camshaft position (CMP) sensor electrical
connector Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Wiring Harness
Removal
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when
working on or near any fuel related components. Highly flammable mixtures are always present
and can ignite. Failure to follow these instructions can result in personal injury.
1. With the vehicle in neutral, position it on a hoist. For additional information, refer to Section 100 -
02 .
2. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
3. Remove the upper intake manifold. For additional information, refer to Section 303 - 01D .
4. Disconnect the following connectors: zThe 42 pin engine bulkhead electrical connector.
z The 16 pin electrical connector.
5. Separate the wiring harness from the dash panel.
6. Remove the RH ignition coil cover. zRemove the bolts.
z Remove the coil cover.
SECTION 303-
04D: Fuel Charging and Controls — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
112003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

11. Disconnect the transmission main control harness electrical connector.
12. Disconnect the engine control jumper harness electrical connector.
13. Remove the wiring harness bracket bolt.
14. Disconnect the RH heated oxygen sensor (HO2S) electrical connector. Klj . 3 ba
112003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

22. Remove the wiring harness.
zSeparate the wiring harness from the LH valve cover stud bolt.
z Separate the wiring harness from the power steering reservoir bracket.
Installation 1. Position the wiring harness: zInstall the wiring harness retainer onto the LH valve cover stud bolt.
z Install the wiring harness retainer into the power steering reservoir.
2. Connect the ECT sensor electrical connector.
3. Connect the CMP sensor electrical connector. Klj . 6 ba
112003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

8.
NOTE: LH side is shown, RH side is similar.
Connect the two radio ignition interference capacitor electrical connectors.
9. Connect the RH HO2S electrical connector.
10. Install the wiring harness bracket bolt.
11. Connect the engine control jumper harness electrical connector. Klj . 8 ba
112003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

16. Connect the RH ignition coil electrical connectors.
17. Install the RH ignition coil cover and bolts.
18. Install the wiring harness retainers into the dash panel.
19. Connect the following connectors:
zThe 42 pin engine bulkhead electrical connector.
z The 16 pin electrical connector. Klj . 10 ba
112003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Supply Manifold
Removal
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when
working on or near any fuel related components. Highly flammable mixtures are always present
and can ignite. Failure to follow these instructions can result in personal injury.
WARNING: Fuel in the fuel system remains under high pressure even when the engine is
not running. Before working on or disconnecting any of the fuel lines or fuel system
components, the fuel system pressure must be relieved. Failure to follow these instructions
can result in personal injury.
1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Remove the upper intake manifold. For additional information, refer to Section 303 - 01D .
3. Relieve the fuel pressure. For additional information, refer to Section 310 - 00 .
4. Disconnect the fuel line. For additional information, refer to Section 310 - 00 .
5. Position the wiring harness aside. zDisconnect the RH fuel injector electrical connectors.
z Separate the harness from the RH fuel supply manifold stud bolt.
6. Disconnect the fuel pressure sensor. zDisconnect the electrical connector.
z Disconnect the vacuum hose.
SECTION 303-
04D: Fuel Charging and Controls — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

7. Position the wiring harness aside.
zDisconnect the LH fuel injector electrical connectors.
z Separate the harness from the LH fuel supply manifold stud bolt.
8. Remove the fuel supply manifold. zRemove the four bolts.
Installation 1. NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms
may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven
16 km (10 mi) or more to relearn the strategy.
To install, reverse the removal procedure. Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...