TRANSMISSION – Ford Expedition 2003 – SYSTEM WIRING DIAGRAMS

TRANSMISSION

4WD Wiring Diagram for Ford Expedition 2003

List of elements for 4WD Wiring Diagram for Ford Expedition 2003:

• (behind left kick panel)
• (on left "b" pillar, behind trim) g300
• 4wd sw
• A/c clutch relay
• Abs control module (at left side of engine compt)
• Air suspension module
• Awd
• C135
• C175b
• C270b
• C270k
• C270m
• C3184a
• C3184b
• Can bus +
• Can bus -
• Central junction box (behind right kick panel)
• Computer data lines system
• Datalink conector (behind left side of dash)
• Diff lock sol
• Four wheel drive control module (at left "b"pillar)
• Four-wheel drive switch
• Fuse 10a
• Fuse 30a
• G301
• Ground
• High
• Hot at all times
• Illum
• Integrated wheel ends solenoid (at right rear of eng compt)
• Interior lights system
• Low
• Magnetic clutch coil
• N tow sw
• Off
• Pcm sig
• Position a
• Position b
• Position c
• Position d
• Powertrain control module (on right side of firewall)
• Red
• S113
• S346
• S349 (body main harn, near g301 breakout)
• S357
• Sig return
• Signal rtn
• Solenoid
• Transfer case
• Transfer case assembly
• Ubp diag
• Vbatt

A/T Wiring Diagram (1 of 2) for Ford Expedition 2003

List of elements for A/T Wiring Diagram (1 of 2) for Ford Expedition 2003:

• (engine crtl harn, near breakout to c129) s125
• (right rear of engine compt)
• C175b
• C270a
• C270b
• C270f
• C3184b
• Central junction box (right kick panel)
• Four wheel drive control module (at left "p" pillar)
• Fuse
• Fuse 15a
• Fuse 20a
• G102
• G102 (right rear of engine compt)
• G200 (right kick panel)
• Ground
• Heated oxygen sensors, turbine shaft speed sensor, idle air control module
• Hot at all times
• Hot in run or start
• Iat input
• Intake air temperature (iat) sensor (in intake system)
• Maf output
• Maf sig rtn
• Mass airflow (maf) sensor (in intake system)
• Nca
• Od cancel sw
• Overdrive cancel switch
• Pcm power diode
• Pcm power relay
• Powertrain control module (right side of engine bulkhead)
• Powertrain control module, fuel injectors
• Red
• S108
• S109 (eng ctrl sensor red harn, near breakout to c1373)
• S127 (engine ctrl harn, near breakout to c187)
• S203
• Throttle position (tp) sensor (on throttle body)
• Tps signal

A/T Wiring Diagram (2 of 2) for Ford Expedition 2003

List of elements for A/T Wiring Diagram (2 of 2) for Ford Expedition 2003:

• (near breakout to c175t)
• 4r70w transmission
• C175e
• C175t
• Digital transmission range sensor (left side of transmission)
• Dtr, tr1
• Dtr, tr2
• Dtr, tr3a
• Dtr, tr4
• Electronic pressure control solenoid
• Epc sol ctrl
• Exterior lights system
• Oss sensor
• Output shaft speed (oss) sensor (rear of transmission)
• Powertrain control module (right side of engine bulkhead)
• R n
• Reference voltage
• S138
• Shift sol a
• Shift sol b
• Shift solenoids
• Signal return
• Starting/ charging system
• Tan/red
• Tcc solenoid
• Tft input
• Torque converter clutch solenoid
• Tps input
• Transmission fluid temperature sensor