All Wiring Diagrams for Ford E550 Super Duty 2003

AIR CONDITIONING

Manual A/C Wiring Diagram, without Stripped Chassis (1 of 2) for Ford E550 Super Duty 2003

List of elements for Manual A/C Wiring Diagram, without Stripped Chassis (1 of 2) for Ford E550 Super Duty 2003:

(at right front of engine compt) g101
(in engine control sensor & fuel charge wiring harness, near breakout to a/c clutch solenoid) s189
(in window regulator relay switch harness, near breakout to ignition switch) s223
(left side of dash) g204
(temperature control potentiometer)
5.4l, 5.4l cng & 6.8l
7.3l di turbo diesel
A/c clutch cycling pressure switch (in right front of engine compartment)
A/c clutch solenoid (on lower right front of engine)
A/c clutch solenoid (on top left front of engine)
A/c compressor clutch diode (near front of engine)
A/c high pressure switch (in right front of engine compartment)
A/c on input signal
C294a
C294d
Central junction box box (cjb) (left side of dash, near kick panel)
Defrost
Floor
Front function selector switch assembly
Front function selector switch assembly front12
Fuse 15a
Hot in run
Max a/c
Mix
Mode switch
Norm a/c
Off
Pnk/ (in main wiring harness, near breakout to front function selector switch assembly) s203
Powertrain control module (pcm) (in left rear of engine compartment, near brake master cylinder)
S111 (in engine control sensor harness, in breakout to battery junction box)
S141 (in engine control sensor harness, near breakout to c139) (7.3l: in engine control sensor harness, near breakout to c1168)
S143 (in engine control sensor harness, at right side of engine compartment)
Temperature blend door actuator (behind right side of dash, on a/c heater plenum)
To blower motor relay (diagram 2 of 2)
To s400 (diagram 2 of 2)
Vent
Vent norm a/c

Manual A/C Wiring Diagram, without Stripped Chassis (2 of 2) for Ford E550 Super Duty 2003

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List of elements for Manual A/C Wiring Diagram, without Stripped Chassis (2 of 2) for Ford E550 Super Duty 2003:

(at left side of dash) g203
(at left side of vehicle rear end)
(at left side of vehicle rear end) g400
(at right front of engine compt) g101
(in a/c blower motor wiring harness, near breakout to rear a/c blower speed relay 1) s400
(in engine control sensor harness, near breakout to c219) s122
(in interior lamps wiring harness, near breakout to interior lamp) s913
(in right rear of engine compartment) blower motor resistor
(in taillamp wiring harness, near breakout to c925) s303
(not used)
87a
Auxiliary blower motor (above left rear wheelwell)
Auxiliary blower motor resistor assembly (above left rear wheelwell)
Auxiliary blower motor switch
Battery junction box (bjb) (in left front of engine compartment)
Blower motor relay
Blower motor switch
C294b
C294c
C951a
C951b
Cutaway
From s111 (diagram 1 of 2)
Front blower motor (on right side of engine compartment)
Front function selector switch assembly
Fuse 50a
G100 (at left side of engine compt)
G400
High
Hot at all times
Illum
Interior lights system
Low
Off
Rear a/c blower speed relay 1 (in left rear corner of vehicle, above wheelwell)
Rear a/c blower speed relay 2 (in left rear corner of vehicle, above wheelwell)
Rear function selector switch assembly
S143 (in engine control sensor harness, at right side of engine compt)
S144 (in engine control sensor harness, at right side of engine compt)
S202 (near breakout to front function selector switch assembly)
S304 (in taillamp wiring harness, near breakout to c925)
S305 (in taillamp wiring harness, near breakout to c925)
S401 (in a/c blower motor wiring harness, in breakout to c405)
Van & wagon
W/ auxiliary a/c
W/ rear control
W/o rear control

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003

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List of elements for Anti-lock Brakes Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003:

(in window regulator relay
(near brake master cylinder)
(under rear of vehicle, mounted on differential) rear axle speed sensor
7.3l
Abs control module (at left side of engine compt)
Abs warning lamp output
Acc
Anti-lock brake indicator
Battery junction box (bjb) (in left front of engine compartment)
Bpp switch input
Brake fluid level switch (at left side of engine compt)
Brake pedal position (bpp) switch (on bracket, above brake pedal)
Brake warning indicator
Brake warning lamp low
C220b
C220c
Central junction box (cjb) (left side of dash, near kick panel)
Data link conn
Data link connector (dlc) (below left side of dash)
Electronic crash sensor (ecs) module (behind right side of dash)
Fuse 1 20a
Fuse 11 15a
Fuse 19 60a
Fuse 2 15a
G100 (at left side of engine compartment)
G101 (at right front of engine compartment)
G203 (at left side of dash)
Ground
Hot at all times
Hot in run
Hot in run or start
Ignition switch
Instrument cluster
Left front sensor high
Left front sensor low
Left front wheel speed sensor (behind left front wheel)
Lock
Nca
Off
Parking brake switch (near left kick panel)
Power
Powertrain control module (pcm)
Rear sensor high
Rear sensor low
Red/pnk
Right front sensor high
Right front sensor low
Right front wheel speed sensor (behind right front wheel)
Run
S1020
S122
S125 (in engine control sensor harness, in breakout to c219)
S134 (in engine control sensor harness, at left rear of engine compartment)
S143
S146
S207
S213
S228
Start
Switch harness, near breakout to c237)
Vacuum warning switch (7.3l) (in left front of engine compartment)
Vbatt

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003

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List of elements for Computer Data Lines Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003:

(7.3l diesel)
(in engine control sensor harness, near breakout to c219) s182
(in engine control sensor harness, near breakout to c219) s184
(in window regulator relay switch harness, near breakout to c237) (7.3l diesel) s263
(left side of dash) g204
5.4l ngv
Abs control module (at left side of engine compt)
Acc
Auxiliary powertrain control module (7.3l diesel) (behind left side of dash)
Central junction box (left side of dash, near kick panel)
Data link connector (dlc) (below left side of dash)
Electronic crash sensor module (behind right side of dash)
Fuse 20a
G101 (at right front of engine compt)
G204 (left side of dash)
Hot at all times
Ignition switch
Lock
Natural gas vehicle module (on left front inner fender panel)
Off
Powertrain control module (pcm) (in left rear of engine compt, near brake master cylinder)
Run
S140
S223
S228 (in window regulator relay switch harness, near breakout to c237)
S229 (near breakout to ignition switch)
S230
S262 (near breakout to c237)
Start

CRUISE CONTROL

6.8L

6.8L, Cruise Control Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for 6.8L, Cruise Control Wiring Diagram for Ford E550 Super Duty 2003:

Accel set/
Air bag sliding contact
Battery junction box (bjb) (in left front of engine compartment)
Bpp sw input
Brake input
Brake pedal position (bpp) switch (on bracket, above brake pedal)
Brake pressure switch (at left side of engine compartment)
C220a
C3140a
Central junction box (cjb) (left side of dash, near kick panel)
Coast
Except stripped chassis
Fuse 10a
Fuse 15a
G203 (at left side of dash)
Ground
Horn relay
Horn switch
Hot at all times
Hot at all times
Hot in run
Instrument cluster
Microprocessor
Nca
Off
On indicator
Overhead console
Power
Powertrain control module (pcm) (in left rear of engine compt, near brake master cylinder)
Remote keyless entry module (behind left ``b" pillar)
Resume
S116
S121 (in engine control sensor harness, near breakout to c219)
S129
S131
S134 (in engine control sensor harness, at left rear of engine compartment)
S135 (in engine control sensor harness, near breakout to powertrain control module)
S268
Scsa gnd
Scsa input
Speed control indicator c220c
Speed control servo (left side of engine compt, near brake master cylinder)
Speed control switch
Vss input

7.3L DI TURBO DIESEL

7.3L DI Turbo Diesel, Cruise Control Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Cruise Control Wiring Diagram for Ford E550 Super Duty 2003:

Accel set/
Air bag sliding contact
Battery junction box (bjb) (in left front of engine compartment)
Bpp sw input
Brake input
Brake pedal position (bpp) switch (on bracket, above brake pedal)
Brake pressure switch (at left side of engine compartment)
C220a
C220c
C3140a
Central junction box (cjb) (left side of dash, near kick panel)
Coast
Except stripped chassis
Fuse 15a
G203 (at left side of dash)
Ground
Horn relay
Horn switch
Hot at all times
Hot at all times
Instrument cluster
Microprocessor
Nca
Off
On indicator
Overhead console
Powertrain control module (pcm) (in left rear of engine compt, near brake master cylinder)
Remote keyless entry module (behind left ``b" pillar)
Resume
S116
S129
S134 (in engine control sensor harness, at left rear of engine compartment)
S135 (in engine control sensor harness, near breakout to powertrain control module)
S136 (in engine control sensor harness, near breakout to powertrain control module)
S139
Scsa gnd
Scsa input
Speed control indicator
Speed control switch
Vehicle speed sensor (vss) (on left side of transmission, under vehicle)
Vss input

ENGINE PERFORMANCE

6.8L

6.8L, Engine Performance Wiring Diagram (1 of 4) for Ford E550 Super Duty 2003

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List of elements for 6.8L, Engine Performance Wiring Diagram (1 of 4) for Ford E550 Super Duty 2003:

(ends in harness)
(engine control harn, near breakout to fuel injector 1)
(engine control harn, near breakout to fuel injector 6)
(engine control harn, near breakout to mass airflow sensor)
(front of left front fender)
(front of right front fender)
(front of right front fender) g101
4 low switch
A/c on sig
A/c system
Battery junction box (left front of engine compt)
Bus +
Bus -
Ccs
Central junction box (behind left side of dash, near left kick panel)
Ckp sens (+)
Ckp sens (-)
Clear tach out
Coil on plug
Coil on plug 1
Coil on plug 10
Coil on plug 5
Coil on plug 6
Data link connector (partial) (behind left side of dash)
Digital transmission range sensor (dtr sensor) (left side of transmission)
Dtr-tr1
Dtr-tr2
Dtr-tr4
Ect
Egr sol
Fp send unit
Fuel inj 10
Fuel pump mon
Fuse 10a
Fuse 30a
Fuse 5a
G100
G101
Gen scan tool
Gnd
Ho2s (22)
Hot at all times
Hot in run or start
Instrument cluster system
Knock sensor
Maf
Mil
Nca
O/d off
Overdrive cancel switch
Pcm power diode
Pcm power relay
Powertrain control module (left rear of engine compt, near brake master cylinder)
Pto
Pwr gnd
R n
Radio capacitor (upper left rear of engine)
Radio capacitor (upper right rear of engine)
Red
S110
S127
S140
S142
S161
S162
S169
Speed ctrl
Ssa
Ssb
Tcs
Tft
To dtr sensor (diagram 4 of 4)
Transmission control indicator lamp

6.8L, Engine Performance Wiring Diagram (2 of 4) for Ford E550 Super Duty 2003

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List of elements for 6.8L, Engine Performance Wiring Diagram (2 of 4) for Ford E550 Super Duty 2003:

(behind upper left side of dash) g203 (or g207)
(engine control harn, left rear of engine compt)
(engine control harn, near breakout to 76-pin conn in left rear of engine compt) s126
(engine control harn, near breakout to coil on plug 9)
(engine control harn, near breakout to pcm)
(front of right front fender)
(near brake master cylinder) speed control servo
(speedometer/ odometer) vehicle speed input
(upper left front of engine) instrumentation engine coolant temperature sensor
Battery junction box (left front of engine compt)
Crankshaft position sensor (lower center front of engine)
Engine coolant temperature gauge
Fuel pump relay
Fuel tank pressure transducer sensor (near fuel tank)
Fuse 30a
G101
Hot at all times
Instrument cluster
Knock sensor (top right rear side of engine)
Malfunction indicator
Nca
Output shaft speed sensor (on left side of transmission)
Overhead console
Power
Red
Red/pnk
S133 (engine control harn, near a/c pressure cutout switch)
S135
S136 (engine control harn, near a/c pressure cutout switch)
S137
S138 (engine control harn, near a/c pressure cutout switch)
S157
S169
S175
Throttle position sensor (top of engine, near air intake)
Turbine shaft speed sensor (right side of transmission)
Vss input

6.8L, Engine Performance Wiring Diagram (3 of 4) for Ford E550 Super Duty 2003

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List of elements for 6.8L, Engine Performance Wiring Diagram (3 of 4) for Ford E550 Super Duty 2003:

(behind right kick panel) inertia fuel shut-off switch
(center rear of engine compt)
(engine control harn, near breakout to 4r100 transmission)
(engine control harn, near breakout to coil on plug 2)
(engine control harn, near breakout to fuel injector 6)
(front of left front fender) g100 (or g113) (left rear of eng compt)
(fuel tank harn, below left center of vehicle) s309
(in fuel tank) fuel pump module
(transmission control harn, near breakout to dtr sensor)
(transmission control harn, near breakout to transmission)
(under vehicle, on left frame rail) (cutaways/stripped) in transit fuel pump module
4r100 transmission
Coast clutch solenoid
Egr vacuum regulator solenoid (top left rear of engine)
Electronic pressure control solenoid
Evap canister purge valve
Except stripped chassis
Fuel injectors
Idle air control valve (top center rear of engine, near air intake)
Nca
Red
Red/pnk
S100
S102
S155
S159
S160
S307
Shift solenoid a
Shift solenoid b
Stripped chassis
Tan
Tan/ red
Tan/red
Torque converter clutch solenoid
Transmission fluid temperature sensor

6.8L, Engine Performance Wiring Diagram (4 of 4) for Ford E550 Super Duty 2003

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List of elements for 6.8L, Engine Performance Wiring Diagram (4 of 4) for Ford E550 Super Duty 2003:

(engine control harn, near a/c pressure cutout switch)
(top front of left cylinder head) cylinder head temperature sensor
(under left rear of vehicle) (except e550) evaporative emissions canister vent valve
270 ohms
Brake on/off
Brake pedal position switch
Camshaft position sensor (left front of engine)
Central junction box (behind left side of dash, near left kick panel)
Cmp sensor
Coil on plug 2
Coil on plug 3
Coil on plug 4
Coil on plug 7
Coil on plug 8
Coil on plug 9
Cyl head temp
Digital transmission range sensor (dtr sensor) (left side of transmission)
Dtr-tr3a
Epc sol
Evap can purge
Evap sol
From dtr sensor (diagram 1 of 4)
Fuel inj 1
Fuel inj 2
Fuel inj 3
Fuel inj 4
Fuel inj 5
Fuel inj 6
Fuel inj 7
Fuel inj 8
Fuel inj 9
Fuel pump ctrl
Fuel tank press
Fuse 15a
G101 (front of right front fender)
Heated oxygen sensor (hos2) 11 (right rear of engine)
Heated oxygen sensor (hos2) 21 (left rear of engine)
Heated oxygen sensor (hos2) 22 (under center of vehicle)
Heater ctrl
Hego 11
Hego 21
Hego 22
Ho2s sig (11)
Ho2s sig (21)
Hot at all times
Iac sol
Kap b(+)
Knock sensor
Maf sens in
Mass air- flow sensor (top center of engine compt)
Nca
Oss sensor
Powertrain control module (left rear of engine compt, near brake master cylinder)
Pwr gnd
Red
Red/pnk
Ref voltage
S140
Sig rtn
Tan
Tan/red
Tcc sol
Tp sens in
Tss sensor
Vpwr

7.3L DI TURBO DIESEL

7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, California (1 of 3) for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, California (1 of 3) for Ford E550 Super Duty 2003:

(below left side of dash) data link connector
(eng ctrl harn, left rear of engine compt)
(eng ctrl sensor harness, near breakout to mass air flow sensor)
(fuel inj harness)
(left rear of engine compt, near brake master cylinder) powertrain control module
(left side of engine compt, bottom of master cyl)
(lower i/p harn, near breakout to rke data link conn)
App sens
Aux tach feed
Auxiliary
Battery junction box
Brake press sw
Brake warning ind
Bus (+)
Bus (-)
C220a
C220b
C220c
Cam pos sens
Ccs sol
Central junction box
Deactivator switch
Dlc
Driveline disconn
Dtr-tr1
Ebp sens
Engine compartment fuse box
Engine oil temperature sensor (center left side of engine)
Eot
Fuel heater (top center of engine)
Fuel line htr
Fuel pump (left rear of engine compt)
Fuel pump relay
Fuse 10a
Fuse 15a
Fuse 30a
Fuse 5a
G100 (front of left front fender)
G100 (front of right front fender)
G101 (front of right front fender)
Gen pwr sw
Glow plug relay
Gpcm
Horn/speed ctrl sw gnd
Hot at all times
Hot in run or start
Iat
Idle validation sw
Idle validation switch (open at idle) (below left side of dash)
Idm relay
Inertia fuel shutoff switch (behind right kick panel)
Injection pressure regulator (top of engine)
Instrument cluster
Instrument cluster system
Intake air temperature sensor (center of engine compt, part of clean air tube)
Mal- function indicator
Mia htr rly
Mil dlc
Nca
Not used
Pcm power diode
Pcm power relay
Powertrain control module (behind left side of dash)
Red
S1013
S110
S127
S129
S140
S142
S175
S176
S180 (engine ctrl harn, above master cyl)
S213
S262
S263
Shield gnd
Ss1
Starting/ charging system
Tcil
Tcs sens
Tft
Vss gnd
Wait to start indicator
Water in fuel ind
Water in fuel indicator

7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, California (2 of 3) for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, California (2 of 3) for Ford E550 Super Duty 2003:

(engine control harn)
(engine ctrl harness)
(front of right front fender)
(fuel inj harn, near eng oil temp sensor)
(fuel injector harn)
(not used)
A/c
A/c on sig
A/c press sw
Accelerator pedal position sensor (left side of dash, above accel pedal)
Accl pos sens
Boo sw
C220a
Camshaft position (cmp) sensor (front center of engine)
Charge ind
Cid sig
Cmp rtn
Cruise control
Dtr-tr2
Dtr-tr4
Epc sol
Epr
Exhaust back pressure (ebp) sensor (top center of engine)
Exhaust pressure regulator (top left rear of engine)
Fuel deliv sig
Fuel pump rly
Fuel sender
G101
G203 (behind upper left side of dash)
Gen pwr sw
Glow plug ctrl
Icp sens
Idm enable out
Idm sig in
Indicator ctrl
Injection control pressure (icp) sensor (on top of engine)
Instrument cluster
Ipr sens
Kapwr
Manifold absolute pressure (map) sensor (top right side of engine compt)
Map sens
Mia htr relay
Nca
Not used
Overdrive cancel switch
Overhead console (except cutaway)
Powertrain control module (left rear of engine compt, near brake master cylinder)
Pwr gnd
Red
S1001
S1002
S120
S135
S136
S137
S138
S139
S140
S205
Sig rtn
Speed ctrl sig
Speedometer
Starting/ charging
Tcc
Tcil
Tcs
Tr sensor
Tss sens
Turbine shaft speed sensor (right side of trans)
Vehicle speed sensor (left side of trans)
Vpwr
Vref
Vs sens
Vss in
Wait to start

7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, California (3 of 3) for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, California (3 of 3) for Ford E550 Super Duty 2003:

(behind left side of dash) g203
(eng control harn, right frt of eng compt)
(engine block)
(fuel inj harn) s1007
(in fuel tank) fuel pump module
(left front side of engine compt)
(under vehicle, on left frame rail) (cutaways) in transit fuel pump module
4r100 transmission
Air intake heater grid
Brake pedal position switch (on bracket, above brake pedal)
C1273a
C1273b
Central junction box
Cid sig in
Coast clutch solenoid
Ctrl out
Digital transmission range sensor (dtr sensor) (left side of transmission)
Electronic pressure control solenoid
Fuel delivery sig
Fuel inj feed left
Fuel inj feed right
Fuel injector no1
Fuel injector no2
Fuel injector no3
Fuel injector no4
Fuel injector no5
Fuel injector no6
Fuel injector no7
Fuel injector no8
Fuse 15a
Gl plug 1
Gl plug 2
Gl plug 3
Gl plug 4
Gl plug 5
Gl plug 6
Gl plug 7
Gl plug 8
Glow plug control module (top right side of engine)
Gpcm
Hot at all times
Idm feedback sig
Inj shield gnd
Injector driver module
Left valve cover assembly
Manifold air intake heater relay (top of engine)
Nca
No1
No2
No3
No4
No5
No6
No7
No8
P, 2, 1
P, n, 1
P, r, 2
P, r, n
Power
Pwr gnd
Red
Right valve cover assembly
S134
S191
S192
S308
S310 (fuel tank harn, below left frt of vehicle)
Shift solenoid a
Shift solenoid b
Sig rtn
Signal return
Tan
Tan/red
Torque converter clutch solenoid
Transmission fluid temperature sensor
Vpwr

7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, Except California (1 of 3) for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, Except California (1 of 3) for Ford E550 Super Duty 2003:

(below left side of dash) data link connector
(eng ctrl harn, left rear of engine compt)
(eng ctrl sensor harness, near breakout to mass air flow sensor)
(fuel inj harness)
(left rear of engine compt, near brake master cylinder) powertrain control module
(left side of engine compt, bottom of master cyl)
(lower i/p harn, near breakout to rke data link conn)
App sens
Aux tach feed
Auxiliary
Battery junction box
Brake press sw
Brake warning ind
Bus (+)
Bus (-)
C220a
C220b
C220c
Cam pos sens
Ccs sol
Central junction box
Deactivator switch
Dlc
Driveline disconn
Dtr-tr1
Ebp sens
Engine compartment fuse box
Engine oil temperature sensor (center left side of engine)
Eot
Fuel heater (top center of engine)
Fuel line htr
Fuel pump (left rear of engine compt)
Fuel pump relay
Fuse 10a
Fuse 15a
Fuse 30a
Fuse 5a
G100 (front of left front fender)
G100 (front of right front fender)
G101 (front of right front fender)
Gen pwr sw
Glow plug relay
Horn/speed ctrl sw gnd
Hot at all times
Hot in run or start
Iat
Idle validation sw
Idle validation switch (open at idle) (below left side of dash)
Idm relay
Inertia fuel shutoff switch (behind right kick panel)
Injection pressure regulator (top of engine)
Instrument cluster
Instrument cluster system
Intake air temperature sensor (center of engine compt, part of clean air tube)
Mal- function indicator
Mia htr rly
Mil dlc
Nca
Not used
Pcm power diode
Pcm power relay
Powertrain control module (behind left side of dash)
Red
S1013
S110
S127
S129
S140
S142
S175
S176
S180 (engine ctrl harn, above master cyl)
S213
S262
S263
Shield gnd
Ss1
Starting/ charging system
Tcil
Tcs sens
Tft
Vss gnd
Wait to start indicator
Water in fuel ind
Water in fuel indicator

7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, Except California (2 of 3) for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, Except California (2 of 3) for Ford E550 Super Duty 2003:

(engine control harn)
(engine ctrl harness)
(front of right front fender)
(fuel inj harn, near eng oil temp sensor)
(fuel injector harn)
(not used)
A/c
A/c on sig
A/c press sw
Accelerator pedal position sensor (left side of dash, above accel pedal)
Accl pos sens
Boo sw
C220a
Camshaft position (cmp) sensor (front center of engine)
Charge ind
Cid sig
Cmp rtn
Cruise control
Dtr-tr2
Dtr-tr4
Epc sol
Epr
Exhaust back pressure (ebp) sensor (top center of engine)
Exhaust pressure regulator (top left rear of engine)
Fuel deliv sig
Fuel pump rly
Fuel sender
G101
G203 (behind upper left side of dash)
Gen pwr sw
Glow plug ctrl
Icp sens
Idm enable out
Idm sig in
Indicator crtl
Injection control pressure (icp) sensor (on top of engine)
Instrument cluster
Ipr sens
Kapwr
Manifold absolute pressure (map) sensor (top right side of engine compt)
Map sens
Mia htr relay
Nca
Not used
Overdrive cancel switch
Overhead console (except cutaway)
Powertrain control module (left rear of engine compt, near brake master cylinder)
Pwr gnd
Red
S1001
S1002
S120
S135
S136
S137
S138
S139
S140
S205
Sig rtn
Speed ctrl sig
Speedometer
Starting/ charging
Tcc
Tcil
Tcs
Tr sensor
Tss sens
Turbine shaft speed sensor (right side of trans)
Vehicle speed sensor (left side of trans)
Vpwr
Vref
Vs sens
Vss in
Wait to start

7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, Except California (3 of 3) for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram, Except California (3 of 3) for Ford E550 Super Duty 2003:

(behind left side of dash) g203
(eng control harn, right frt of eng compt)
(engine block)
(fuel inj harn) s1007
(in fuel tank) fuel pump module
(left front side of engine compt)
(under vehicle, on left frame rail) (cutaways) in transit fuel pump module
4r100 transmission
Air intake heater grid
Brake pedal position switch (on bracket, above brake pedal)
Central junction box
Cid sig in
Coast clutch solenoid
Digital transmission range sensor (dtr sensor) (left side of transmission)
Electronic pressure control solenoid
Fuel delivery sig
Fuel inj feed left
Fuel inj feed right
Fuel injector no1
Fuel injector no2
Fuel injector no3
Fuel injector no4
Fuel injector no5
Fuel injector no6
Fuel injector no7
Fuel injector no8
Fuse 15a
Glow plug relay (top right side of engine)
Hot at all times
Idm feedback sig
Inj shield gnd
Injector driver module
Left valve cover assembly
Manifold air intake heater relay (top of engine)
Nca
No1
No2
No3
No4
No5
No6
No7
No8
P, 2, 1
P, n, 1
P, r, 2
P, r, n
Pwr gnd
Red
Right valve cover assembly
S1003 (fuel injector harn, right top of engine)
S1004 (fuel inj harn, left top of eng)
S134
S191
S308
S310 (fuel tank harn, below left frt of vehicle)
Shift solenoid a
Shift solenoid b
Sig rtn
Signal return
Tan
Tan/red
Torque converter clutch solenoid
Transmission fluid temperature sensor
Vpwr

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003

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List of elements for Backup Lamps Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003:

(at left side of vehicle rear end) g400
(in left front of engine compartment) battery junction box
(near breakout
(not used)
Central junction box (left side of dash, near kick panel)
Digital transmission range (dtr) sensor (on left side of transmission)
E550
Except e550
Fuse 15a
Hot in run
Left reversing lamp
Reversing lamp trailer tow relay
Right reversing lamp
S402
S403 (near breakout to high mounted stoplamp)
S406

Exterior Lamps Wiring Diagram, without Stripped Chassis (1 of 2) for Ford E550 Super Duty 2003

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List of elements for Exterior Lamps Wiring Diagram, without Stripped Chassis (1 of 2) for Ford E550 Super Duty 2003:

(at left rear of engine compt) s134
(ends in harness) (cutaway)
(in dash panel to headlamp junction wiring harness, near breakout to g103) s165
(near breakout to c237)
(near breakout to c248) s232
(not used)
Anti- lock brakes system
Batt
Battery junction box (in left front of engine compt)
Beacon lamp (dealer- fitted)
Brake pedal position switch (on bracket, above brake pedal)
C202a
C220a
C3140a
Central junction box (left side of dash, near kick panel)
Central junction box (left side of dash, near kick panel)
Compartment)
Cruise control system
Cutaway
E550
E550, cutaway
Electronic flasher module or grote flasher module (behind left side of dash)
Engine controls system
Except e550
Except e550, cutaway
Fuse 10a
Fuse 15a
Fuse 20a
G100 (at left side of engine compt)
G102 (at left front of vehicle)
G203 (at left side of dash)
G204 (left side of dash)
G400 (at left side of vehicle rear end)
Hazard
Hazard switch
Head
High mounted stop lamp
Hot at all times
Hot in run
Ign
Instrument cluster
Left front park/ turn lamp
Left rear park/ stop/ turn lamp
Left turn indicator
License plate lamp
Main light switch
Multi- function switch
Nca
Normal
Off
Overhead console
Park
Red
Remote keyless entry module (behind left "b" pillar)
Resistor
Right front park/ turn lamp
Right rear park/ stop/ turn lamp
Right turn indicator
S122
S129
S163
S207
S217 (left side of dash)
S218
S223
S226
S234 (near breakout to c311)
S235
S306 (near breakout to high mounted stoplamp)
S340
S402
S406
Shift inter- lock system
Solid state
Stop lamp relay
To battery junction box (fuses 5 & 6) (digram 2 of 2)
To c311)
To clearance lamp relay (diagram 2 of 2)
To electronic brake control connector (diagram 2 of 2)
To parking lamp trailer tow relay (diagram 2 of 2)
Turn left
Turn right

Exterior Lamps Wiring Diagram, without Stripped Chassis (2 of 2) for Ford E550 Super Duty 2003

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List of elements for Exterior Lamps Wiring Diagram, without Stripped Chassis (2 of 2) for Ford E550 Super Duty 2003:

(at left side of engine compt) g100
(class 1)
(class 2)
(class 2) (class 1)
(ends in harness)
(in breakout to c110)
(in left front of engine compt) battery junction box
(in marker lamp to switch harness, near breakout to center roof marker lamp) s950
(left rear of engine compt) modified vehicle power
(left side of dash) g204
(near breakout to c237) s118
(not used)
Auxiliary battery relay
Backup lamps circuit
Battery charge trailer tow relay
Battery ii
Battery junction box (in left front of engine compartment)
Center roof marker lamp
Central junction box (left side of dash, near kick panel)
Clearance lamp relay
Digital transmission range (dtr) sensor (on left side of transmission)
E550
Except 5.4l ngv
Except 7.3l
Except e550
From brake pedal position switch (diagram 1 of 2)
From main light switch (diagram 1 of 2)
From multi- function switch (diagram 1 of 2)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 40a
Fuse 5a
Fuse 60a
G100 (at left side of engine compartment)
G100 (at left side of engine compt)
G110 (on right frame rail)
G204 (left side of dash)
G401 g100 (except 7.3l) (at left side of (at left side of engine compt)
Hot at all times
Hot in run
Hot in run or acc
Interior lights system
Left
Left rear lamp assembly
Left roof marker lamp
Nca
Parking lamp trailer tow relay
Reversing lamp trailer tow relay
Right
Right rear lamp assembly
Right roof marker lamp
S108
S109
S112
S113 (except diesel)
S122
S130 (in engine control sensor harness, near breakout to c237)
S223
S324
S430
S431 (near breakout to c421)
S432
S951
Trailer electronic brake control connector
Trailer tow connector (7 pin) (class 2) (at center of vehicle rear end)
Trailer tow connector (at center of vehicle rear end)
Vehicle rear end)
W/ auxiliary battery
W/ auxiliary battery jumper
W/o auxiliary battery

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram, without Stripped Chassis (1 of 4) for Ford E550 Super Duty 2003

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List of elements for Ground Distribution Wiring Diagram, without Stripped Chassis (1 of 4) for Ford E550 Super Duty 2003:

(in engine control sensor harness, at right side of engine compartment)
(in engine control sensor harness, in breakout to c134)
(in left front of engine compartment) battery junction box (bjb)
4.2l
4.6l
5.4l cng
5.4l, 6.8l
6.8l
7.3l
7.3l diesel
A/c clutch solenoid
A/c compressor clutch diode
Battery
Battery ii
Blower motor resistor
Brake fluid level switch
Camshaft position sensor
Crankshaft position sensor shield
Data link connector (dlc)
Electronic crash sensor (ecs) module
Except 4.2l
Except 7.3l diesel
Exhaust pressure regulator (epr)
Fuel rail cut- off valve
G101 (right front of engine compt)
G107 (right side of engine compt)
G110 (on right frame rail)
G199 (right side of engine compt)
G206 (right side of dash)
G300 (center of vehicle floor)
Gasoline models
Intake manifold runner control (imrc) module
Left video display
Mass air flow (maf) sensor
Natural gas vehicle (ngv) timer jumper
Nca
Pcm power relay
Powertrain control module (pcm)
Right video display
Right video display)
S140 (engine control sensor harn, near breakout to powertrain control module)
S140 (in engine control sensor harness, near breakout to powertrain control module)
S143
S169 (in engine control sensor harness, in breakout to powertrain control module)
S170
S171
S189 (in engine control sensor & fuel charge wiring harness, near breakout
S2005 (in breakout to c3138)
S2009 (in breakout to 299)
S380 (in breakout to c983)
S381 (in breakout to 299)
S916 (near breakout to left video display)
Shield
To intake manifold runner control module)
Windshield washer pump motor

Ground Distribution Wiring Diagram, without Stripped Chassis (2 of 4) for Ford E550 Super Duty 2003

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List of elements for Ground Distribution Wiring Diagram, without Stripped Chassis (2 of 4) for Ford E550 Super Duty 2003:

(7.3l) (not used)
(aero)
(dealer- fitted) (not used)
(except 7.3l) speed control servo
(in fuel tank sender extension harness, in breakout to rear aft-axle fuel tank valve) s320
(in fuel tank sender wiring harness, near breakout to c1279)
(in left front of engine compartment) battery junction box (bjb)
(not used)
(sealed beam)
5.4l cng
7.3l
7.3l diesel
Anti-lock brake system control module
Blower motor relay
C220a
C220c
Clearance lamp relay
Cutaway
Cutaway, stripped chassis, e550
Daytime running lamps (drl) module
E550
Engine coolant temperature (ect) sender
Except 5.4l cng
Except 7.3l
Except cutaway
Extended range fuel tank valve 1
Extended range fuel tank valve 2
Front aft- axle fuel tank valve
Fuel pump
Fuel pump module
Fuel sender
G100 (left side of engine compartment)
G102 (left front of vehicle)
G103 (right front of vehicle)
G202 (left side of dash)
Gas
Gasoline models
In-transit fuel pump module
Injector driver module (idm)
Instrument cluster
Left front park/turn lamp
Left headlamp
Left rear lamp assembly
Midship fuel tank valve
Natural gas vehicle (ngv) module
Natural gas vehicle (ngv) timer jumper
Nca
Others
Powertrain control module (pcm)
Rear aft- axle fuel tank valve
Right front park/turn lamp
Right headlamp
Right rear lamp assembly
S122 (in engine control sensor harness, near breakout to c219)
S139 (in engine control sensor harness, near breakout to powertrain control module)
S163 (in dash panel to headlamp junction wiring harness, near breakout to forward crash sensor)
S205 (in main wiring harness, near breakout to radio)
S268 (in main wiring harness, in breakout to c219)
S307 (in fuel tank sender wiring harness, near breakout to fuel pump module)
S308 (in fuel tank sender wiring harness, on fuel tank)
S317 (in fuel tank sender wiring harness, near breakout to fuel sender)
S322 (in fuel tank sender extension harness, near breakout to c3149)
S324
S432 (near breakout to c421)
Stop lamp relay
To g203 (diagram 3 of 4)
Trailer tow battery charge relay
Trailer tow connector, 4-pin
Trailer tow parking lamp relay
Trailer tow reversing lamp relay
Vacuum warning switch
Vehicle speed sensor (vss)
W/ extended range tank
Wiper control module (wcm)

Ground Distribution Wiring Diagram, without Stripped Chassis (3 of 4) for Ford E550 Super Duty 2003

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List of elements for Ground Distribution Wiring Diagram, without Stripped Chassis (3 of 4) for Ford E550 Super Duty 2003:

(dealer- fitted) (not used)
(dealer- fitted) beacon lamp
(diagram 2 of 4)
(in left front door window regulator harness, near breakout to master window/
(not used)
(not used) (dealer- fitted)
(w/ hinged side door)
(w/ rear seat entertainment system) power point
(w/ rse)
(w/ sliding side door) memory lock module
(w/o remote keyless entry) data link connector (dlc)
(w/o rse)
7.3l diesel
Air bag sliding contact
Auxiliary powertrain control module (apcm)
Brake shift interlock
C2188a
C220a
C294b
C294c
C294e
C3077a
C3140a
Center roof marker lamp
Class i
Console 1 power point
Console 2 power point
Cutaway, w/o rear entertainment system
Door lock/unlock switch)
Driver safety belt retractor pretensioner
Driver side exterior rear view mirror
Driver side front seat adjust switch
E550
Electronic flasher module
Ends in harness
Exterior rear view mirror switch
From s268
Front cigar lighter
Front function selector switch assembly
Front passenger window/door lock switch
G203 (left side of dash)
G204 (left side of dash)
Instrument cluster
Left center roof marker lamp
Left roof marker lamp
Master window/door lock/unlock switch
Nca
Near breakout to c3052)
Near breakout to c328)
Parking break switch
Power point
Puddle lamp relay
Radio
Rear seat entertainment (rse) module
Remote keyless entry module
Resistor
Right center roof marker lamp
Right roof marker lamp
S202 (in main wiring harness, near breakout to front function selector switch assembly)
S223 (in window regulator relay switch harness, near breakout to ignition switch)
S235 (in window regulator relay switch harness, at bottom of left "b" pillar)
S299 (in window regulator relay switch harness, in breakout to c3134)
S315 (in seat control feed jumper harness, near breakout to c3134)
S500
S951 (in marker lamp to switch harn, near breakout to right center roof marker lamp)
Temperature blend door actuator
To s300 (diagram 4 of 4)
Trailer electronic brake control connector
W/ driver's power seat
W/ manual a/c
W/ rear seat entertainment system
W/o driver's power seat
W/o rear seat entertainment system
Warning buzzer/ chime module

Ground Distribution Wiring Diagram, without Stripped Chassis (4 of 4) for Ford E550 Super Duty 2003

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List of elements for Ground Distribution Wiring Diagram, without Stripped Chassis (4 of 4) for Ford E550 Super Duty 2003:

951b
C2188a
C3077a
C311)
C3140a
Cargo lamp
Data link connector (dlc)
From s235 (diagram 3 of 4)
Front interior/ map lamps assembly
G200 (right side of dash)
G204 (left side of dash)
G301 (center of vehicle floor)
G400 (left side of vehicle rear end)
High mounted stoplamp
Interior lamp
Left rear park/stop/ turn lamp
Left reversing lamp
Left video display
License plate lamp
Nca
Not used
Overhead console
Radio
Rear a/c blower speed relay 1
Rear a/c blower speed relay 2
Rear function selector switch assembly
Rear interior lamp
Rear seat entertainment (rse) module
Remote keyless entry module
Right rear park/stop/ turn lamp
Right reversing lamp
Right video display
S2007 (near breakout to c3053)
S2008 (near breakout to c3053)
S260 (in window regulator relay switch harness, near breakout to g204)
S273 (in breakout to c210)
S274 (near breakout to radio)
S289 (near breakout to radio)
S293 (near breakout to radio)
S300 (in taillamp wiring harness, near breakout to c311)
S401 (in a/c blower motor wiring harness, in breakout to c405)
S406 (in taillamp wiring harness, at right side of vehicle rear end)
S913 (in interior lamps wiring harness, near breakout to interior lamp)
S915 (in interior lamps wiring harness, near breakout to c925)
S920 (in interior lamps wiring harness, in breakout to right video display)
S930 (in interior illumination wiring harness, in breakout to overhead console)
Shield
To c3138)
Video cassette player
W/ full headliner
W/ rear seat entertainment system
W/ rke
W/o full headliner
W/o rear seat entertainment system

HEADLIGHTS

Headlights Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003

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List of elements for Headlights Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003:

507/13
527/12
Batt
Battery junction box (in left front of engine compartment)
C202b
C220a
C220b
Central junction box (left side of dash, near kick panel)
Daytime running lamps (drl) module (mounted to radiator support, under a/c condenser deflector cover)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 40a
G102 (at left front of vehicle)
G202 (at left side of dash)
G203 (at left side of dash)
Gnd
Head
Hi beam in
Hi beam ind
Hot at all times
Hot in run
Ign
Instrument cluster
Left headlamp
Main light switch
Multi- function switch (at left side of dash)
Off
P v lo beam
Park
Pass
Right headlamp
S116
S131
S163
S164 (in dash panel to headlamp junction wiring harness, near breakout to daytime running lamps module)
S205
S207
S218
S270 (near breakout to air bag sliding contact)
S276 (in main wiring harness, under left side of dash)
S277 (in main wiring harness, in breakout to multifunction switch)
S278 (in main wiring harness, in breakout to multifunction switch)
W/ aero headlamp
W/o aero headlamp

HORN

Horn Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Horn Wiring Diagram for Ford E550 Super Duty 2003:

(at center of dash)
(near breakout to powertrain control module) s136
15a
Air bag sliding contact
Battery junction box (in left front of engine compt)
C3140a
Cruise control system
Diesel
Except diesel
Except stripped chassis
Fuse 27
G207 (w/ stripped chassis)
High pitch horn
Horn relay
Horn switch
Hot at all times
Low pitch horn
Nca
Powertrain control module (in left rear of engine compt, near brake master cylinder)
Remote keyless entry module (behind left "b" pillar)
S116
S121 (in engine control sensor harness, near breakout to c219)
S286 (w/ stripped chassis)
Sig rtn
Speed control servo (left side of engine compt, near brake master cylinder)
W/ cruise control
W/o cruise control

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Instrument Cluster Wiring Diagram for Ford E550 Super Duty 2003:

(4.6l, 5.4l, 6.8l: on lower left front of engine) (7.3l diesel: on top right center of engine) (4.2l: on left front of engine, below a/c compressor) oil pressure switch
(at center of dash) (stripped chassis) g207
(at left side of engine compt) g100
(at left side of dash) g203
(conn a)
(conn b)
(conn c)
(except stripped (stripped chassis) chassis) (at left rear of (in breakout to c134)
(except stripped chassis)
(except stripped chassis) (stripped chassis)
(except stripped chassis) s268
(in engine control sensor harness, in breakout to c219) s125
(near breakout to c219) (except stripped chassis) s120 (stripped chassis) (near breakout to g112)
(near breakout to c327) s310
(on fuel tank)
(stripped chassis)
4.6l
5.4l cng
A10
A11
A14
A16
Air bag ind
All others
Anti-lock brake ind
Anti-lock brakes system
B11
B12
Battery junction box (bjb) (in left front of engine compt)
Brake warning ind
C10
C12
C220a
C220b
C220c
Central junction box (cjb) (left side of dash, near kick panel)
Charge ind
Chassis)
Cruise control system
Cutaway, stripped chassis
Dealer- fitted
Diesel
Eng cool temp gauge
Eng oil press gauge
Engine compt)
Engine controls system
Engine controls system (diesel)
Engine coolant temperature sender (4.2l, 4.6l: on top front center of engine) (5.4l: on lower intake manifold) (6.8l: on upper left front of engine)
Engine coolant temperature sender (on lower left front of engine)
Engine immobilisation indicator
Except 4.6l
Except 5.4l cng
Except diesel
Exterior lights system
Fuel pump module (under vehicle, in fuel tank)
Fuse 10a
Fuse 15a
Fuse 5a
G203 (except stripped chassis) (at left side of dash)
G203 (left side of dash)
G207 (stripped chassis) (at center of dash)
Gas
Ground
Headlights system
Hi beam ind
Hot at all times
Hot in start or run
Illumination
In-line fuse (behind left side of dash)
In-transit fuel pump module (under vehicle, on left frame rail)
Instrument cluster
Interior lights system
Left turn ind
Low fuel ind, fuel gauge
Low oil pressure/ high coolant temperature
Malfunction ind lamp (mil)
Microprocessor
Natural gas vehicle module (on left front inner fender panel)
Nca
Parking brake switch (near left kick panel)
Power
Red
Right turn ind
S122
S133
S146 (except stripped chassis)
S175
S207 s284 (stripped chassis)
S207 s286
S213 (near breakout to instrument cluster)
S268
S284 (stripped chassis)
S287
S308
Safety belt ind
Seat belt lamp
Speed control ind
Speedometer
Vaccum warning switch (7.3l) (in left front of engine compt)
Vans/wagons
Voltmeter
Wait to start ind
Warning system
Warning system (stripped chassis)
Water in fuel ind

Overhead Console Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Overhead Console Wiring Diagram for Ford E550 Super Duty 2003:

(not
Ambient air temperature sensor (left front of engine compt)
Central junction box (cjb) (left side of dash, near kick panel)
Fuse 15a
G204 (left side of dash)
Hot at all times
Hot in run or acc
Main light switch (behind left side of dash) head
Nca
Off
Overhead console
Park
S206
S245 (except stripped chassis)
S930
Transmissions system
Used)
Vpwr

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Courtesy Lamps Wiring Diagram for Ford E550 Super Duty 2003:

(in window regulator relay switch harness, near breakout to c248) s231
Central junction box (left side of dash, near kick panel)
Ends in harness
Exterior lights system
Fuse 15a
Hot at all times
Interior
Left front door ajar switch
Main light switch
Nca
Red/ pnk
Right front door ajar switch
S221
Warning systems

Courtesy Lamps Wiring Diagram, Dealer Installed for Ford E550 Super Duty 2003

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List of elements for Courtesy Lamps Wiring Diagram, Dealer Installed for Ford E550 Super Duty 2003:

(in window regulator relay switch harness, near breakout to c3052) s247
(not used)
Central junction box (left side of dash, near kick panel)
Ends in harness
Fuse 15a
Hot at all times
Interior
Left front door ajar switch
Main light switch
Nca
Red/ pnk
Right front door ajar switch
S221
S231 (in window regulator relay switch harness, near breakout to c248)
Warning systems

Instrument Illumination Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Instrument Illumination Wiring Diagram for Ford E550 Super Duty 2003:

(5) bulbs
(ends in harness)
(not used)
(w/ rse)
Air bag sliding contact
C2188a
C218b
C220a
C294e
C3077a
C951b
Central junction box (left side of dash, near kick panel)
Cutaway
Dimmer
Except cutaway
Except stripped chassis
Front function selector switch assembly (w/ manual a/c)
Fuse 20a
Fuse 5a
G203 (at left side of dash)
G207 (at center of dash)
Head
Hot at all times
I/p lamp feed
Ign
Illumination
Instrument cluster
Instrument cluster, warning system
Main light switch
Nca
Off
Park
Radio
Rear function selector switch assembly
Rear seat entertainment module (in floor console)
S202
S207
S212 (in main wiring harness, near breakout to instrument cluster)
S218
S284
Side marker lamps
Speed control switch
Stripped chassis
W/ rear seat entertainment system

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 5) for Ford E550 Super Duty 2003

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List of elements for Power Distribution Wiring Diagram (1 of 5) for Ford E550 Super Duty 2003:

module (gpcm)
(e550 : in engine control sensor harness, near breakout to battery junction box) (5.4l ngv: in engine control sensor harness, near breakout to c219) s183
(ends in harness)
(except stripped
(except stripped chassis) s225 s280
(in breakout to battery junction box) s101
(in engine control sensor harness, in breakout to abs control module)
(in engine control sensor harness, in breakout to battery junction box) s116
(in engine control sensor harness, near breakout to c219) s115
(in fuel charge wiring harness, near breakout to glow plug control module) s192
(in fuel charge wiring harness, near breakout to manifold intake air heater relay)
(in starter relay to fuse junction panel harness, in breakout to starter relay)
(in window regulator relay switch harness, near breakout to c248) s254
(in window regulator relay switch harness, w/o rse: near breakout to central jb) w/ rse: near breakout to c237)
5.4l ngv
A/c clutch relay
Abs control module
Battery
Battery 2 (diesel)
Battery junction box (bjb) (in left front of engine compt)
Blower motor relay
Breakout to c237) (stripped chassis: in breakout to ignition switch)
C1273a
C1273b
C3140b
California
Central junction box (cjb) (left side of dash, near kick panel)
Chassis: near
Clearance lamp relay (e550)
Console 1 power point (w/ rear seat entertainment system)
Console 2 power point (w/ rear seat entertainment system)
Cutaway
Daytime running lamps (drl) module
E550
Except california
Except cutaway
Except stripped chassis
From a fuse 15 (diagram 1 of 5)
Fuel pump relay
Fuse
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 20a (e550)
Fuse 30a
Fuse 30a (diesel)
Fuse 40a
Fuse 50a
Fuse 60a
Fused battery feed
Generator
Glow plug control
Glow plug relay
Horn relay
Injector driver module (idm) power relay
Main light switch
Manifold intake air heater relay
Modified vehicle power
Natural gas vehicle (ngv) module
Nca
Power point (except cutaway)
Rear a/c blower speed relay 1
Red
Remote keyless entry
Remote keyless entry module
S1008
S1010 (in alternator rectifier system wiring harness, in breakout to battery junction box)
S1011 (in alternator rectifier system wiring harness, in breakout to battery junction box)
S1012 (7.3l di turbo disel) (in alternator to starter motor solenoid harness, near breakout to starter relay)
S1020
S178 (7.3l di turbo disel) (in alternator rectifier system wiring harness, in breakout to c1282)
S187 (in fuel charge wiring harness, near breaqkout to starter relay)
S191
S233
S235
S257 (in window regulator relay switch harness, near breakout to c311)
S266
Secondary generator (diesel)
Starter motor
Starter relay
Stripped chassis
To fuse 17 (diagram 1 of 5)
To fuse 9 (diagram 2 of 5)
To ignition switch (diagram 3 of 5)
Trailer electronic brake control connector
W/ rse

Power Distribution Wiring Diagram (2 of 5) for Ford E550 Super Duty 2003

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List of elements for Power Distribution Wiring Diagram (2 of 5) for Ford E550 Super Duty 2003:

(in breakout to battery junction box)
(in engine control sensor harness, near breakout to c237) (except stripped chassis, cutaway) s129
(in left front door window regulator harness, near breakout to master window/door lock/unlock switch) s506
(in main wiring harness, in breakout to c219) s218
(in main wiring harness, near breakout to c219) (stripped chassis, cutaway) s2020
(in main wiring harness, under left side of dash) s276
(in window regulator relay switch harness, near breakout to c248)
(in window regulator relay switch harness, near breakout to ignition switch) s227
(in window regulator relay switch harness, near breakout to ignition switch) s230
(not used)
(stripped chassis: in engine
1.2 mh
Aux battery
Auxiliary battery relay
Batt
Battery 2
Battery charge trailer tow relay
Battery junction box (bjb) (in left front of engine compt)
Brake pedal position switch
Brake pressure switch
Breakout to battery junction box)
C202a
C202b
C2188a
C220a
C3077a
C3140a
Central junction box (cjb) (left side of dash, near kick panel)
Control
Data link connector (dlc)
Dealer- fitted
Driver side front seat adjust switch
Electronic crash sensor (ecs) module
Except stripped chassis
Except stripped chassis, cutaway
Exterior rear view mirror switch
From b fuse 12 (diagram 1 of 5)
Front cigar lighter
Front passenger window/ door lock switch
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 25a
Fuse 30a
Fuse 40a 60a
Fuse 5a
Fuse 60a
G203 (left side of dash)
Hinged side door
Instrument cluster
Main light switch
Master window/ door lock/ unlock switch
Memory lock module (sliding side door)
Multi- function switch
Nca
Near kick panel)
Off
Parking lamp trailer tow relay
Pcm power relay
Power choke 1
Power point
Powertrain control module (pcm)
Radio
Rear doors door lock switch
Rear seat entertainment (rse) module
Red
Remote keyless entry module
Reversing lamp trailer tow relay
Rke only
Rse system
S108
S109 (in engine control sensor harness, in breakout to battery junction box)
S110 (in engine control sensor harness, in breakout to battery junction box)
S148
S175 (except stripped chassis : in engine control sensor harness, in sensor harness, near breakout to c219)
S207
S237
Stop lamp relay
Stripped chassis
To fuse 4 (diagram 5 of 5)
Video cassette player
W/ remote keyless entry
W/o aux battery
W/o remote keyless entry
W/o rse system

Power Distribution Wiring Diagram (3 of 5) for Ford E550 Super Duty 2003

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List of elements for Power Distribution Wiring Diagram (3 of 5) for Ford E550 Super Duty 2003:

(behind left side of dash) in-line fuse
(dealer- fitted)
(ends in harness)
(in engine control sensor harness, in breakout to battery junction box) s113
(in engine control sensor harness, near breakout to c237) (except stripped chassis) s131
(in interior illumination wiring harness, near breakout to c934) s900
(in interior lamps wiring harness, near breakout to interior lamp) s912
(in main wiring harness, near breakout to c219) (stripped chassis) s282
(near breakout to overdrive cancel switch) s281 s229 (near breakout to ignition switch)
(not used)
(stripped chassis) (except stripped chassis)
A/c demand signal
Abs control module
Acc
Auxiliary battery
Auxiliary battery relay
Auxiliary powertrain control module (apcm) (diesel)
Brake shift interlock
Breakout to front function selector switch assembly) s203
C202a
C220a
C294a
Cargo lamp
Central junction box (cjb) (left side of dash, near kick panel)
Daytime running lamps (drl) module
Dealer fitted
Dealer- fitted
Digital transmission range (dtr) sensor
Electronic crash sensor (ecs) module
Except stripped chassis
From fuse 4 j (diagram 5 of 5)
From splice s225 c (diagram 1 of 5)
From splice s225 d (diagram 1 of 5)
Front function selector switch assembly
Front interior/ map lamps assembly (wagon)
Full headliner
Fuse
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 5a
High mounted stoplamp
Ign
Ignition switch
Instrument cluster
Interior lamp
Left vanity mirror lamp
Lock
Multi- function switch
Nca
Near breakout to c237)
Off
Rear doors door ajar switch
Rear interior lamp
Red/
Right vanity mirror lamp
Run
Rv van
S249 (in window regulator relay switch harness, red/
S302 (in taillamp wiring harness, near breakout to c311)
Speed control servo (except stripped chassis)
Start
Stripped chassis
Temperature blend door actuator
To c237)
To fuse 2 (diagram 4 of 5)
To fuse 34 (diagram 4 of 5)
To fuse 9 (diagram 5 of 5)
W/o full headliner

Power Distribution Wiring Diagram (4 of 5) for Ford E550 Super Duty 2003

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List of elements for Power Distribution Wiring Diagram (4 of 5) for Ford E550 Super Duty 2003:

(4.6l)
(5.4l) (4.6l)
(in engine control sensor & fuel charge wiring harness, at right center of engine) (5.4l) s161
(in engine control sensor & fuel charge wiring harness, at right center of engine) s161
(in engine control sensor harness, at left rear of engine compartment) s127
(in window regulator relay switch harness, near breakout to ignition switch)
(in window regulator relay switch harness, near breakout to inertia fuel shutoff switch) s265
(in window regulator relay switch wiring harness, at left side of dash) s216
4.2l
4.6l/5.4l
6.8l
Battery junction box (bjb) (in left front of engine compt)
C2188a
C220a
C220c
C3217
Central junction box (cjb) (left side of dash, near kick panel)
Coil on plug (cop) 1
Coil on plug (cop) 10
Coil on plug (cop) 2
Coil on plug (cop) 3
Coil on plug (cop) 4
Coil on plug (cop) 5
Coil on plug (cop) 6
Coil on plug (cop) 7
Coil on plug (cop) 8
Coil on plug (cop) 9
Digital transmission range (dtr) sensor
Except stripped chassis
From fuse 8 (diagram 4 of 5) (4.2l)
From fuse 8 (diagram 4 of 5) (4.6l/5.4l)
From fuse 8 (diagram 4 of 5) (6.8l)
From ignition switch f (diagram 3 of 5)
From ignition switch g (diagram 3 of 5)
Fuel heater (diesel)
Fuel pump relay
Fuse 10a
Fuse 15a
Fuse 30a
Fuse 5a
Idle validation switch (diesel)
Ignition coil
Ignition transformer capacitor 1
Ignition transformer capacitor 2
Injector driver module (idm) power relay
Instrument cluster
Natural gas vehicle (ngv) timer jumper
Nca
Overdrive cancel switch
Pcm power diode
Pcm power relay
Puddle lamp relay
Radio (except stripped chassis)
S146 (in engine control sensor harness, near breakout to c219)
S150 (in engine control sensor & fuel charge wiring harness, near breakout to coil on plug 3)
S156 s193 (in engine control sensor & fuel charge wiring harness, near breakout to coil on plug 8)
S162 (in engine control sensor & fuel charge wiring harness, near breakout to fuel injector 8)
S213 (in main wiring harness, near breakout to instrument cluster)
S267 (in main wiring harness, near breakout to electronic crash sensor module)
S269
Stripped chassis
Tan/ red
Tan/red
To ignition coils (gasoline engines) or glow plug relay (diesel engine) (diagram 4 of 5)
Vacuum warning switch (diesel)
W/ diesel
W/ ngv
Warning buzzer/ chime module (except stripped chassis)

Power Distribution Wiring Diagram (5 of 5) for Ford E550 Super Duty 2003

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List of elements for Power Distribution Wiring Diagram (5 of 5) for Ford E550 Super Duty 2003:

(in engine control sensor harness, in breakout to windshield wiper motor) s128
(in main wiring harness, at center of dash) s208
(in main wiring harness, near breakout to brake pedal position switch) s219
(in window regulator relay switch harness, near breakout to temperature blend door actuator) s221
(in window regulator relay switch harness, near breakout to g204)
(in window regulator relay switch harness, near breakout to ignition switch) s294
(in window regulator relay switch harness, near breakout to inertia fuel shutoff switch) s290
(in window regulator relay switch harness, near breakout to temperature blend door actuator) s221
Battery charge trailer tow relay
Battery junction box (bjb)
C2188a
C3140a
Central junction box (cjb) (left side of dash, near kick panel)
Circuit breaker 20a
Courtesy switch feed (taped in harness)
Diesel
Ends in harness (cutaway)
Except cutaway
Except diesel
Except stripped chassis
From e fuse 28 (diagram 2 of 5)
From ignition switch (diagram 3 of 5)
Front passenger window/ door lock switch
Fuse 15a
Fuse 30a
Fuse 4 15a (stripped chassis)
Fuse 4 15a (w/ rear seat entertainment)
Fuse 4 15a (w/o rear seat entertainment)
Fuse 5a
Hinged side doors
Ignition switch feed
Left front door ajar switch
Left video display
Main light switch
Master window/ door lock unlock switch
Nca
Overhead console
Radio
Rear doors door lock switch
Remote keyless entry
Remote keyless entry module
Right front door ajar switch
Right sliding or side door ajar switch
Right sliding/ side door ajar switch
Right video display
S236 (in window regulator relay switch harness, under left side of dash)
S296
Shutoff switch) s290
Sliding side door
Stripped chassis
To high mounted stoplamp (diagram 3 of 5)
To splice s302 (diagram 3 of 5)
Video cassette player
Windshield wiper motor
Wiper control module (wcm)

POWER DOOR LOCKS

Door Lock Wiring Diagram, Cutaway Chassis for Ford E550 Super Duty 2003

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List of elements for Door Lock Wiring Diagram, Cutaway Chassis for Ford E550 Super Duty 2003:

(in breakout to left front door lock actuator) s502
(near breakout to driver side front power window motor) s503
Central junction box (cjb) (left side of dash, near kick panel)
Front passenger window/ door lock switch
Fuse 20a
G204 (left side of dash)
Hot at all times
Left front door lock actuator
Lock
Master window/ door lock/ unlock switch
Red
Right front door lock actuator
S237
S600
Unlk

Door Lock Wiring Diagram, with Keyless Entry for Ford E550 Super Duty 2003

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List of elements for Door Lock Wiring Diagram, with Keyless Entry for Ford E550 Super Duty 2003:

(in window regulator relay switch harness, near breakout to c311)
(in window regulator relay switch harness, near breakout to g204)
(left side of dash) g204
(near breakout to c248) s238
Battery
C3140a
C3140b
C3235 c384
C806
C807
Central junction box (cjb) (left side of dash, near kick panel)
Diesel w/ rse
Door lock
Early production
Exterior lights system
Front passenger window/ door lock switch
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 5a
Ground
Horn relay ctrl
Horns system
Hot at all times
Hot in acc or run
Ignition
Int lamps out
Interior lights system
Late production
Left front door lock actuator
Lf door lock
Light switch in
Lock
Lock in
Master window/ door lock/ unlock switch
Others
Rear doors door lock switch
Rear doors lock actuator
Remote keyless entry module (behind left "b" pillar)
Rf door lock
Right front door lock actuator
Right side door lock actuator
Right sliding door contact switch
S221
S235
S239 (near breakout to g204)
S245
S251
S252
S255
S257
S258 (near breakout to left middle speaker)
S260
S290
S296
S506
Side door lock
Side door sw in
Side/rear lock
Unlock
Unlock in
W/ hinged door
W/ sliding door

POWER MIRRORS

Power Mirrors Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Power Mirrors Wiring Diagram for Ford E550 Super Duty 2003:

(not used)
Down
Driver side exterior rear view mirror
Exterior rear view mirror switch
Horizontal
Left
Left mirror select
Left/ right
Nca
Passenger side exterior rear view mirror
Red
Right
Right mirror select
S504 (in front top of driver door)
Up/ down m
Vertical

Power Mirrors Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Power Mirrors Wiring Diagram for Ford E550 Super Duty 2003:

Central junction box (cjb) (left side of dash, near kick panel)
Down
Driver side exterior rear view mirror
Exterior rear view mirror switch
Fuse 5a
G204 (left side of dash)
Horizontal
Hot at all times
Interior lights system
Left
Left/ right
Left/ right m
Mirror select
Nca
Passenger side exterior rear view mirror
Red
Right
S500
S504 (in front top of driver door)
S506 (w/ remote keyless entry)
Up/ down m
Vertical
W/ puddle lamps

POWER SEATS

Power Seats Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Power Seats Wiring Diagram for Ford E550 Super Duty 2003:

(w/ rse)
(w/o rse)
Central junction box (left side of dash, near kick panel)
Driver seat front height motor
Driver seat horizontal motor
Driver seat rear height motor
Entire seat
Front driver side seat adjust switch
Front of seat
Fuse 30a
Fwd
G204 (left side of dash)
Hot at all times
Nca
Rear of seat
Rwd
S299
S315

POWER WINDOWS

Power Windows Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Power Windows Wiring Diagram for Ford E550 Super Duty 2003:

Central junction box (cjb) (left side of dash, near kick panel)
Circuit breaker 43 20a
Driver side front power window motor
Front passenger window/ door lock switch
G204 (left side of dash)
Hot in run or acc
Master window/ door lock/ unlock switch
Passenger side front power window motor
S236
S500
S501 (in left front door window regulator harness, near breakout to master window/ door lock/unlock switch)

RADIO

Radio Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Radio Wiring Diagram for Ford E550 Super Duty 2003:

(at left side of dash) g203
(in window regulator relay switch harness, near breakout to temperature blend door actuator)
(in window regulator relay switch harness, near breakout to c311)
(not used)
Antenna
C2188a
C3235
C384
C806
C807
Central junction box (left side of dash, near kick panel)
Cutaway, e550
Early production
Fuse 15a
Fuse 5a
G200 (at right side of dash)
Ground
Hinged side door
Hot at all times
Hot in park or head
Hot in run or acc
Hot in start
Illumination
L front speaker
L rear speaker
Late production
Left front speaker
Left middle speaker (w/ 6 speakers)
Left rear speaker
Memory power
Nca
Noise reduction
Power
R front speaker
R rear speaker
Radio
Right front speaker
Right middle speaker (w/ 6 speakers)
Right rear speaker
Right sliding door contact switch
S202
S204
S212
S240
S241
S243
S244
S245
Sliding side door
Van, wagon

Radio Wiring Diagram, with Rear Entertainment (1 of 2) for Ford E550 Super Duty 2003

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List of elements for Radio Wiring Diagram, with Rear Entertainment (1 of 2) for Ford E550 Super Duty 2003:

(at center of vehicle floor) g301
(at left side of dash) g203
(in breakout to c210)
(in breakout to c3138) s2006
(near breakout to c3053)
(near breakout to c3053) s2007
(near breakout to electronic crash sensor module)
(near breakout to inertia fuel
(near breakout to radio)
(near breakout to radio) s274
Antenna
C2188a
C2188b
Central junction box (left side of dash, near kick panel)
Fuse 15a
Fuse 5a
G200 (at right side of dash)
Ground
Hot at all times
Hot in park or head
Hot in run or acc
Hot in start
Illumination
L front speaker
L rear speaker
Left front speaker
Memory power
Nca
Noise reduction
Power
R front speaker
R rear speaker
Radio
Red
Right front speaker
S2003
S2008
S202
S204
S212
S222
S245
S272
S273
S289
S291
S293
Shield
Shutoff switch)
Signal
Tan

Radio Wiring Diagram, with Rear Entertainment (2 of 2) for Ford E550 Super Duty 2003

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List of elements for Radio Wiring Diagram, with Rear Entertainment (2 of 2) for Ford E550 Super Duty 2003:

(at right side of dash) g200
(in breakout to c983)
(in breakout to left video display)
(in breakout to right video display)
(in window regulator relay switch harness, near breakout to c311) s243
(left side of dash) g204
(near breakout to c311) s298
(near breakout to c340)
(near breakout to c925) s914
(near breakout to right video display)
C3077a
C3077b
C3235
C384
C806
C807
Early production
G300 (at center of vehicle floor)
G400 (at left side of vehicle rear end)
Ground
Interior lights system
Late production
Left middle speaker
Left rear speaker
Left video display
Nca
Power
Power choke 1
Rear seat entertainment module
Red
Right middle speaker
Right rear speaker
Right sliding door contact switch
Right video display
S2005 (in breakout to c3138)
S2009 (in breakout to c299)
S235
S240 (near breakout to temperature blend door actuator)
S288 (in window regulator relay switch harness, near breakout to c311)
S297
S323
S381 (in breakout to c299)
S915
S916
S920 (in breakout to right video display)
S921
S941
Shield
Signal
Tan
Video cassette player

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Shift Interlock Wiring Diagram for Ford E550 Super Duty 2003:

Brake pedal position (bpp) switch (on bracket, above brake pedal)
Brake shift interlock (below right side of steering column)
Central junction box (left side of dash, near kick panel)
Fuse 11 15a
Fuse 6 10a
G203 (except stripped chassis) (at left side of dash)
G207 (stripped chassis) (at center of dash)
Hot at all times
Hot in run
S131 (except stripped chassis)
S134 (except stripped chassis) (at left rear of engine compt)
S207 (except stripped chassis)
S282 (stripped chassis)
S286 (stripped chassis)
Shift lock solenoid
Solid state

STARTING/CHARGING

6.8L

6.8L, Charging Wiring Diagram, without Dual Generators for Ford E550 Super Duty 2003

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List of elements for 6.8L, Charging Wiring Diagram, without Dual Generators for Ford E550 Super Duty 2003:

(exc stripped chassis)
(exc stripped chassis) (stripped chassis)
(in right front corner of engine compt, near battery) starter relay
(stripped chassis)
Acc
Auxiliary powertrain control module (apcm) (7.3l) (behind left side of dash)
Battery
Battery junction box (bjb) (in left front of engine compt)
C102a
C220c
C22oc
Central junction box (cjb) (left side of dash, near kick panel)
Charge indicator
Fuse 5a
Fuse 60a
G107 (at right side of engine compt)
Generator
Ground distribution system
Ignition switch
Instrument cluster
Lock
Off
Red
Run
S1008
S1010
S1011
S225
S229 s281
S280
Start
Starter motor

6.8L, Starting Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for 6.8L, Starting Wiring Diagram for Ford E550 Super Duty 2003:

(stripped chassis) (exc stripped chassis)
5.4l cng
Acc
Battery
Battery junction box (bjb) (in left front of engine compt)
Central junction box (cjb) (left side of dash, near kick panel)
Digital transmission range (dtr)
Fuse 10a
Fuse 60a
G107 (at right side of engine compt)
Ground distribution system
Ignition switch
Lock
Natural gas vehicle (ngv)timer jumper (near pcm, on left rear of engine compt)
Not used
Off
Power distribution system
Red
Run
S1008
S269
Sensor (on left side of transmission)
Start
Starter motor
Starter relay (in right front corner of engine compt, near battery)
Tan/ red

7.3L DI TURBO DIESEL

7.3L DI Turbo Diesel, Charging Wiring Diagram, without Dual Generators for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Charging Wiring Diagram, without Dual Generators for Ford E550 Super Duty 2003:

(exc stripped chassis)
(exc stripped chassis) (stripped chassis)
(in right front corner of engine compt, near battery) starter relay
(stripped chassis)
Acc
Auxiliary powertrain control module (apcm) (7.3l) (behind left side of dash)
Battery
Battery junction box (bjb) (in left front of engine compt)
C102a
C220c
C22oc
Central junction box (cjb) (left side of dash, near kick panel)
Charge indicator
Fuse 5a
Fuse 60a
G107 (at right side of engine compt)
Generator
Ground distribution system
Ignition switch
Instrument cluster
Lock
Off
Red
Run
S1008
S1010
S1011
S225
S229 s281
S280
Start
Starter motor

7.3L DI Turbo Diesel, Charging Wiring Diagram, with Dual Generators for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Charging Wiring Diagram, with Dual Generators for Ford E550 Super Duty 2003:

(at right side of engine compt)
(in right front corner of engine compt, near battery) starter relay
Accy
Auxiliary powertrain control module (apcm) (behind left side of dash)
Battery
Battery 2
Battery junction box (bjb) (in left front of engine compt)
C1104a
C1251a
C220c
C22oc
Central junction box (left side of dash, near kick panel)
Charge indicator
Fuse 5a
Fuse 60a
G107 (at right side of engine compt)
G110 (on right frame rail)
G199
Generator
Ground distribution system
Ignition switch
Instrument cluster
Lock
Off
Powertrain control module (pcm) (in left rear of engine compartment, near brake master cylinder)
Red
Run
S1008
S1010
S1011
S1012
S178
S225
S229
Secondary generator
Start
Starter motor

7.3L DI Turbo Diesel, Starting Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, Starting Wiring Diagram for Ford E550 Super Duty 2003:

Acc
Battery
Battery 2
Battery junction box (bjb) (in left front of engine compt)
Central junction box (cjb) (left side of dash, near kick panel)
Digital transmission range (dtr)
Fuse 10a
Fuse 60a
G107 (at right side of engine compt)
G110 (on right frame rail)
Ground distribution system
Ignition switch
Lock
Off
Power distribution system
Red
Run
S1008
S225
S269
Sensor (on left side of transmission)
Start
Starter motor
Starter relay (in right front corner of engine compt, near battery)
Tan/red

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Supplemental Restraints Wiring Diagram for Ford E550 Super Duty 2003:

(in window regulator relay switch harn, near breakout to c237) s228
Abs control module (at left side of engine compartment)
Air bag bracket
Air bag bracket (right side dash panel)
Air bag ind
Air bag indicator
Air bag sliding contact
Battery
C135
C220c
C303
C323
Central junction box (cjb) (left side of dash, near kick panel)
Crash sensor
Data link connector (dlc) (partial) (below left side of dash)
Door open input
Driver air bag
Driver air bag unit
Driver door open input
Driver safety belt retractor pretensioner (under driver seat)
Electronic crash sensor (ecs) module (behind right side of dash)
Feed
Forward crash sensor (in front center of engine compartment, behind grille)
Fuse 2.14 5a
Fuse 2.19 10a
Fuse 2.38 10a
Fuse 2.4 15a
G204 (left side of dash)
G206 (right side dash)
Ground
Hot at all times
Hot in run
Hot in run or start
Ignition
Instrument cluster
Iso bus
Left front door ajar switch (left rocker panel)
Nca
Pass air bag
Passenger air bag module
Passenger safety belt retractor pretensioner (under passenger seat)
Pnk
Preten feed
Preten return
Pretensioner feed
Pretensioner nca
Pretensioner return
Red/ pnk
Red/pnk
S201 (in main wiring harn, near breakout to electronic crash sensor module)
S221
S235
S265
S267
S275 (in main wiring harn, near breakout to instrument cluster)
Safety belt buckle sw input
Safety belt buckle switch input
Shorting bar
Shorting bar engaged when module connector is disconnected from harness (shorting bars are connected between following pins: 1-15, 7-21 & 14-28)
Warning buzzer/ chime module (behind center of dash)

TRANSMISSION

6.8L

6.8L, A/T Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for 6.8L, A/T Wiring Diagram for Ford E550 Super Duty 2003:

(eng control harn, near breakout to a/c cutout switch)
(eng control harn, near breakout to pcm)
(eng control harn, near c1033 breakout)
(eng ctrl harn, in breakout to pcm)
(engine control harn, above left center of engine)
(engine ctrl harn, center of engine compt)
(in battery junction box)
(top center of engine compt) mass airflow (maf) sensor
(trans ctrl harn, rear of engine)
(trans ctrl harn, rear of engine) s102
4r100 transmission
Abs system, warning buzzer module
Battery junction box
Battery junction box (left front of engine compt)
Bpp
Brake pedal position switch (on bracket, above brake pedal)
C220a
C220b
C220c
Cc sol
Central junction box (behind left side of dash)
Cht
Coast clutch solenoid
Cruise control system
Cylinder head temperature sensor (top front of left cylinder head)
Data (+)
Data (-)
Data link connector (below left side of dash)
Digital transmission range sensor
Electronic pressure control solenoid
Engine controls
Epc
Exterior lights
Fuse 10a
Fuse 15a
Fuse 30a
Fuse 5a
G101 (right front of engine compt)
G203 (left side of dash)
Gen data
Gnd
Hot at all times
Hot in run or start
Iat
Instrument cluster
Instrument cluster system
Instrumentation engine coolant temperature sensor (upper left front of engine)
Kapwr
Maf
Malfunction indicator lamp
Mil
Multifunction switch, deactivator switch
Nca
Od off
Oss
Output shaft speed sensor (left side of transmission)
Overdrive cancel switch
Pcm diode
Pcm power relay
Powertrain control module (pcm) (left rear of engine compartment, near brake master cylinder)
Pwr in
Radio noise capacitors, ignition coils
Red
S100
S110
S127
S134 (eng ctrl harn, left rear of eng compt)
S135 (eng cntrl harn, near pcm breakout)
S136
S137
S138
S140
S142
S157
S175
S213
S224 (near c237 breakout)
Shift solenoid a
Shift solenoid b
Sig rtn
Speedometer
Ssa
Tcc
Tcil
Tcs
Tft
Throttle position sensor (tps) (on top of engine, near air intake)
Torque converter clutch solenoid
Tps
Tr1
Tr2
Tr3
Tr4
Transmission fluid temperature sensor
Tss
Turbine shaft speed sensor (left side of transmission)
Vref
Vss
Vss gnd

7.3L DI TURBO DIESEL

7.3L DI Turbo Diesel, A/T Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for 7.3L DI Turbo Diesel, A/T Wiring Diagram for Ford E550 Super Duty 2003:

(center left side of engine) engine oil temperature sensor
(engine control harness, in pcm break- out)
(engine ctrl harn, center rear of eng compt)
(engine ctrl harn, near c1033 breakout)
(engine ctrl harn, near pcm breakout)
(fuel charge harn, near inj ctrl press sensor breakout)
(fuel chg harn, near trans range sen breakout)
(in battery junction box)
(left side of dash) g203
(lower i/p harn)
4r100 transmission (right side of transmission)
Abs system, warning buzzer module
Accelerator pedal (ap) position sensor (behind left side of dash, above accelerator pedal)
Acel pdl
Ap sens
Auxiliary powertrain control connector (partial) (behind left side of dash)
Battery junction box
Battery junction box (left front of engine compt)
Bpp
Brake pedal position switch (on bracket, above brake pedal)
C220b
C220c
Ccs
Central junction box (behind left side of dash)
Chk eng
Coast clutch solenoid
Data (+)
Data (-)
Data link connector (dlc) (partial) (below left side of dash)
Digital transmission range sensor
Electronic pressure control solenoid
Eng oil
Engine controls
Epc
Exterior lights
Fuse 10a
Fuse 15a
Fuse 30a
Fuse 5a
G101 (right front of engine compt)
Gen data
Glow plug relay, fuel line htr, idle validation switch
Gnd
Hot at all times
Hot in run or start
Iat
Idm relay, fuel pump relay
Instrument cluster
Intake air temperature sensor (center of engine compt, part of clean air tube)
Kapwr
Low vacuum warning switch
Malfunction indicator lamp
Manifold absolute pressure sensor (right side of engine compt)
Map
Multifunction switch deactivator switch
Nca
Od off
Overdrive cancel switch
Pcm diode
Pcm power relay
Powertrain control module (pcm) (left rear of engine compartment, near brake master cylinder)
Pwr in
Red
S1001
S1007
S110
S127
S134 (eng ctrl harn, left rear of eng compt)
S135
S136
S137
S138
S139
S140
S142
S146
S175
S176
S213
S224 (near c237 breakout)
S262
S263
Shift solenoid a
Shift solenoid b
Sig rtn
Ssa
Ssb
Tcc
Tcil
Tcs
Tft
Torque converter clutch solenoid
Tr1
Tr2
Tr3
Tr4
Transmission fluid temperature sensor
Tss
Turbine shaft speed sensor (w/ electric fuel pump) (right side of transmission)
Vehicle speed sensor (left side of transmission)
Vref
Vss
Vss gnd

WARNING SYSTEMS

Warning Systems Wiring Diagram for Ford E550 Super Duty 2003

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List of elements for Warning Systems Wiring Diagram for Ford E550 Super Duty 2003:

(at left side of dash) g203
(left side of dash) g204
(w/o rse) (w/ rse)
Buckle switch
C220a
C220b
C220c
Central junction box (left side of dash, near kick panel)
Crash sensor module)
Door open
Driver safety belt retractor pretensioner
Fasten belts
Fuse 15a
Fuse 20a
Gnd
Ground
Head
Headlamps on
Hot at all times
Hot in start or run
Ignition key switch
Instrument cluster
Interior lights system
Key in ignition
Left front door ajar switch
Main light switch
Micro- processor & engine immobilization indicator
Nca
Off
Park
Power
Preten- sioner
Red/pnk
S201 (near breakout to electronic red/ pnk
S207
S213
S218
S235
S275 (in main wiring harness, near breakout to instrument cluster)
Safety belt ind
Seat belt
Warning buzzer/ chime module (behind center of dash)

WIPER/WASHER

Wiper/Washer Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003

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List of elements for Wiper/Washer Wiring Diagram, without Stripped Chassis for Ford E550 Super Duty 2003:

C202b
Central junction box (cjb) (left side of dash, near kick panel)
Common
Fuse 30a
G101 (at right front of engine compartment)
G202 (at left side of dash)
Ground
Hot in run or acc
Intrvl ctl
Max
Min
Multi-function switch (at left side of dash)
Off
Park
Park sw
Power
Run
S143
S205
S208
Wash
Windshield washer pump motor (attached to washer fluid reservoir, on right fender apron)
Windshield wiper motor (left rear of engine compt)
Wiper control module (wcm) (behind center of dash)
Wiper high
Wiper low
Wiper mode
Wshr pump