Diagram sections — 24 (51 total)
AIR CONDITIONING ANTI-LOCK BRAKES BODY CONTROL MODULES COMPUTER DATA LINES CRUISE CONTROL ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Heater Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Heater Wiring Diagram for Ford F550 Super Duty 1999: 37 (engine sensor harness, near breakout to blower motor resistor) (right side of engine compartment, near battery) g108 (under center of dash) g201 Blend door actuator (behind center of dash) Blend door potentiometer Blower motor Blower motor resistor (right side of engine compartment, near blower motor) Blower motor switch Blower relay C220 C242 C243 C260 C296 C298 Cold Def Floor Flr & def Function selector switch Fuse 10a Fuse 40a Hot at all times Hot in run Illumi- nation Instrument panel fuse box Interior lights system Mode selector switch Off Panel Panel & Power distribution box S180 (engine harness, near breakout to g108) S235 (main harness, near breakout to brake pedal position sensor) S257 (main harness, near breakout to inertia switch) S290 (main harness, near breakout to customer access) Warm Manual A/C Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Manual A/C Wiring Diagram for Ford F550 Super Duty 1999: 48 A/c A/c clutch diode (taped in harness, near a/c compressor) A/c compressor clutch solenoid (left side of engine compartment) A/c cycling pressure switch (right side of engine compartment) Blend door actuator (behind center of dash) Blend door potentiometer Blower motor Blower motor resistor (right side of engine compartment, near blower motor) Blower motor switch Blower relay C225 C242 C243 C260 C296 C298 Cold Def Defrost Floor Flr & def Flr/def Function selector switch Fuse 10a Fuse 40a G101 (front of right front fender) G206 (behind center of dash) Hot at all times Hot in run Illumi- nation Instrument panel fuse box Interior lights system Junction box fuse/relay panel (lower left side of dash) Max a/c Mode selector switch Off panel/floor Panel Panel & off floor Power distribution box Powertrain control module (pcm) (right side of engine compartment) Refrigerant containment switch (right rear corner of engine compartment) S152 (engine sensor harness, near breakout to blower motor resistor) S180 (engine harness, near breakout to g108) S235 (main harness, near breakout to brake pedal position sensor) S257 (main harness, near breakout to inertia switch) S290 (main harness, near breakout to customer access) Vacuum pump (diesel) Warm
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Anti-lock Brakes Wiring Diagram for Ford F550 Super Duty 1999: 47 (behind center of dash) data link connector 22k ohm 5.6k ohm Anti-lock brake indicator Anti-lock brake system (abs) module (left front of engine compt) Brake fluid level switch (on brake fluid reservoir) Brake pedal position (bpp) switch (behind left side of dash, above brake pedal) C1040 C1041 C243 C250 C253 Computer data lines system Differential speed sensor (dss) (on rear axle) Fuse 10a Fuse 5a Fuse 60a G104 (rear of left front fender) G106 (behind left headlamp) G206 (behind center of dash) Generic control module (gem), instrument cluster, junction box fuse/relay panel, overhead trip computer (otc) module, powertrain control module, speed control servo amplifier Generic electronic module (gem) (behind lower left side of dash) Hot at all times Hot in run Hot in start or run Instrument cluster Instrument cluster system Junction box fuse/relay panel (behind lower left side of dash) Left front anti-lock brake sensor (w/ 4wal) (at wheel) Left front sensor (high) Left front sensor (low) Power distribution box (left side of engine compartment) Rear sensor (high) Rear sensor (low) Red/pnk Right front anti-lock brake sensor (w/ 4wal) (at wheel) Right front sensor (high) Right front sensor (low) S102 S108 S201 S201 (main harness, behind left side of dash) S213 S225 Tan/red Vss (+) W/ 4wal
BODY CONTROL MODULES Body Control Modules Wiring Diagram (1 of 2) for Ford F550 Super Duty 1999 List of elements for Body Control Modules Wiring Diagram (1 of 2) for Ford F550 Super Duty 1999: 40 Accessory delay relay Accessory delay relay ctrl C241 C242 C243 Circuit breaker 25 30a Cruise control system Engine controls system Fuse 10a Fuse 15a Fuse 5a Fused battery power (b+) Fused ignition (acc/run) Fused ignition (start) G206 (behind center of dash) Generic electronic module (gem) Head lamp dome switch Horn relay Horn relay ctrl Horns system Hot at all times Hot in Hot in run or acc Instrument cluster Interior lamp relay Interior lamp relay ctrl Interior lights system Junction box fuse/ relay panel (behind lower left side of dash) Lf window motor sense (high) Lf window motor sense (low) Lf window switch in (down) One touch down relay One touch down relay ctrl One touch down switch in Power distribution box (left side of engine compt) Power windows system S218 Speed control out Start Vehicle speed (+) Body Control Modules Wiring Diagram (2 of 2) for Ford F550 Super Duty 1999 List of elements for Body Control Modules Wiring Diagram (2 of 2) for Ford F550 Super Duty 1999: 81 (park/headlamps on) in 4 high to 4 low relay ctrl 4 low to 4 high relay ctrl 4x2 center axle solenoid ctrl 4x4 center axle solenoid ctrl 4x4 high range ind ctrl 4x4 low range ind ctrl 4x4 mode switch in 4x4 mode switch ref Anti-lock brakes sytem (brake fluid level switch) Brake fluid level sig Brake indicator out Brake pedal position switch C239 C243 C247 Computer data lines system (datalink pin 7) Contact plate a in Contact plate b in Contact plate c in Contact plate p in Diagnostic link Diesel only Door ajar indicator ctrl Door locks system (driver unlock relay) Door locks system (lock switches) Driver unlock relay ctrl Exterior lights system (brake pedal position switch) Exterior lights system (parklamp relay) Fuse 10a Fused ignition (run/start) G200 (lower left kick panel) Generic electronic module (gem) (behind lower left side of dash) Ground Hot in run or start Ignition key warning switch in Instrument cluster system Interval delay/wash in Junction box fuse/relay panel (behind lower left side of dash) Lf door ajar switch in Lock switch in (lock) Lock switch in (unlock) Park brake switch (behind left side of dash, on park brake assembly) Park brake warning lamp Parklamp relay ctrl Powertrain control module (left side of firewall) Rear door ajar switches in Red Rf door ajar switch in S208 S213 S245 (main harn, behind left side of dash) Seat belt indicator ctrl Seat belt warning switch in Signal return Tan/red Tone request Torque on demand relay out Trans in neutral in Transmission controls system (4 wheel drive mode switch) Transmission controls system (4x2 axle disconnect solenoid) Transmission controls system (4x4 axle disconnect solenoid) Transmission controls system (transfer case assembly) Transmission controls system (transfer case shift relays) Transmission controls system (transfer case) Transmission controls system (transmission range sensor) Warning systems (ignition key warning switch) Warning systems (lf door ajar switch) Warning systems (main light switch) Warning systems (rear door ajar switches) Warning systems (rf door ajar switch) Warning systems (seat belt warning switch) Washer pump control Wiper hi/lo relay ctrl Wiper mode select switch in Wiper motor park sense Wiper run/park relay ctrl Wiper/washer system (hi/lo relay) Wiper/washer system (multi-function switch) Wiper/washer system (run/park relay) Wiper/washer system (washer pump relay)
COMPUTER DATA LINES Computer Data Lines Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Computer Data Lines Wiring Diagram for Ford F550 Super Duty 1999: 24 (main harn, near breakout to customer access) s225 (under center of dash) data link connector (dlc) Anti-lock brake system module (on left side of engine compt) Auxiliary powertrain module (lower right corner of dash) (w/diesel) C228 C239 C242 C248 C295 C911 Cigar lighter Fuse 3 20a G102 (left side engine compt.) G200 (lower left kick panel) Generic electronic module (gem) (behind left side of dash) Hot at all times Junction box fuse/ relay panel (under left side of dash) Overhead trip computer module (center of cab roof) Powertrain control module (pcm) (on left side of firewall) Restraints control module (behind right side of dash) S217 S219 (main harn. near b/o) S221 (main harn. near b/o) S242
CRUISE CONTROL
6.8L 6.8L, Cruise Control Wiring Diagram for Ford F550 Super Duty 1999 List of elements for 6.8L, Cruise Control Wiring Diagram for Ford F550 Super Duty 1999: 48 10a 20a A/t Accel Anti-lock brake system (abs) module (in left front of eng compt) Brake pedal position (bpp) switch (above brake pedal) Brake press in Brake pressure switch (on left side of eng compt) Brake/clutch sw in C242 C243 Clock spring Clutch pedal position (cpp) switch (above clutch pedal) Clutch pedal position (cpp) switch jumper (above clutch pedal) Coast Differential speed sensor (on center of rear axle) Fuse 13 Fuse 15 Fuse 28 G101 (front of right front fender) G206 (behind center of dash) Generic electronic module (gem) Ground Horn Horn relay Hot at all times Hot in run Junction box fuse/ relay panel Junction box fuse/relay panel M/t Nca Off Ohms Power Red/pnk Resume S115 (engine harn, below brake fluid reservoir) S124 S180 S201 S205 (main harness, left of steering column) Set/ Speed control servo/ amplifier assembly (in right side of engine compt) Speed control/ horn switch assembly (in steering wheel) Speed ctrl sw in Speed ctrl sw rtn Vss input Vss signal
7.3L DI TURBO DIESEL 7.3L DI Turbo Diesel, Cruise Control Wiring Diagram for Ford F550 Super Duty 1999 List of elements for 7.3L DI Turbo Diesel, Cruise Control Wiring Diagram for Ford F550 Super Duty 1999: 44 10a Accel Anti-lock brake system (abs) module (in left front of eng compt) Brake pedal position (bpp) switch (above brake pedal) Brake position in Brake press in Brake pressure switch (on left side of eng compt) C242 C243 Clock spring Clutch pedal position (cpp) switch (m/t only) (above clutch pedal) Clutch position in Coast Differential speed sensor (on center of rear axle) Fuse 15 Fuse 19 G206 (behind center of dash) Generic electronic module (gem) Horn Horn relay Hot at all times Hot in start or run Junction box fuse/ relay panel Junction box fuse/relay panel Nca Off Ohms Pcm power relay Power distribution box (left side of engine compt) Powertrain control module (on left side of firewall) Red Red/pnk Resume S108 (engine harn, near brake pressure switch) S115 (engine harn, below brake fluid reservoir) S123 (engine harness, left of steering column) S201 S213 Set/ Speed control/ horn switch assembly (in steering wheel) Speed ctrl sw in Speed ctrl sw rtn Vss input Vss signal
ENGINE PERFORMANCE
6.8L 6.8L, Engine Performance Wiring Diagram (1 of 4) for Ford F550 Super Duty 1999 List of elements for 6.8L, Engine Performance Wiring Diagram (1 of 4) for Ford F550 Super Duty 1999: 84 (bottom of left kick panel) g200 (eng sens harn, right side of eng, above cylinder 3) (engine harness, near breakout to power distribution box) (left rear corner of eng compt) g104 (left rear corner of engine compt) g104 (not used) (on left side of engine) (on right side of engine) 4x4 low ind sw 820 ohms Ac head press sw Air conditioning system Body computer system C243 C251 C253 Ccs Ckp(+) Ckp(-) Data link (+) Data link (-) Data link connector (dlc) (partial) (behind center of dash) Data output Diag grd Digital transmission range (dtr) sensor (on left side of transmission) Egr sol Fpsr cntrl Fuel gauge in Fuel inj 10 Fuel pump mon Fuse 10a Fuse 20a Fuse 30a Hego 12 Hot at all times Hot in run or start Iat Ign coil 1 Ign coil 10 Ign coil 5 Ign coil 6 Ignition coils Instrument cluster Instrument cluster system Junction box fuse/relay panel (behind lower left side of dash) Maf Mil ind Nca Not used O/d off Overdrive cancel switch (a/t) Pcm power diode Pcm power relay Power distribution box (in left side of engine compt, on top wheelwell) Powertrain control module (pcm) (on left side of firewall) Pwr gnd Pwr take off in R n Radio noise capacitor Radio noise capacitor 2 Red Red/ Reprog pwr S102 S103 S106 S120 S130 (engine harn, near breakout to throttle body conn) S135 S201 S213 Shift sol 1 Shift sol 2 Tach Tcs Temp output Tft To dtr sensor (diagram 4 of 4) Tr1 Tr2 Tr4 Trans ctrl ind Transmission control indicator lamp Vss (-) 6.8L, Engine Performance Wiring Diagram (2 of 4) for Ford F550 Super Duty 1999 List of elements for 6.8L, Engine Performance Wiring Diagram (2 of 4) for Ford F550 Super Duty 1999: 45 (engine control sensor harn, near breakout to pcm) (engine harn, breakout to brake pressure switch) (engine harn, near breakout to aftermarket circuits) s128 (engine harness, near breakout to 40-pin conn, left of steering column) (left rear side of eng compt) fuel pump resistor (lower left side of dash) junction box fuse/relay panel (main harness, near breakout to customer access) C251 C253 C267 Crankshaft position (ckp) sensor (lower front center of engine) Crankshaft position sensor shield Delta pressure feedback egr (dpfe) sensor (on right side of engine, near throttle position sensor) Engine coolant temp guage Engine coolant temperature (ect) sender (on top left front of engine) Fuel pump relay Fuel pump speed relay Fuel reset switch indicator Fuel tank pressure sensor (at fuel tank) Fuse 20a G102 (left side of engine compt) G104 (left rear of eng compt) G200 (bottom of left kick panel) Generic electronic module Hot at all times I/p relay block (behind dash, near instrument cluster) Instrument cluster Instrument cluster system Intake air temperature sensor (left side of eng compt, behind air cleaner) Nca Power distribution box (in left side of engine compt, on top of wheelwell) Red Red/pnk S102 S104 S106 S114 S123 S129 S132 (engine harn, near top of cylinder 7) S133 (engine harn, near top of cylinder 6) S201 S226 Throttle position (tp) sensor (on throttle body) Vss input 6.8L, Engine Performance Wiring Diagram (3 of 4) for Ford F550 Super Duty 1999 List of elements for 6.8L, Engine Performance Wiring Diagram (3 of 4) for Ford F550 Super Duty 1999: 34 (at fuel tank) fuel pump module (backup lamp harn, near breakout to 16-pin conn, in left side of eng compt) (behind right kick panel) inertia fuel shut-off switch (engine harn, near breakout to 40-pin conn, left of steering column) (engine sens harn, near top of cylinder 8) (in engine harn, near top of cylinder 3) (in rear center of engine compartment) 4r100 transmission Coast clutch solenoid Egr control solenoid (on left side of engine) Electronic pressure control solenoid Fuel injectors Fuse 5a Hot at all times Idle air control (iac) valve (on throttle body assembly) Instrument cluster system Junction box fuse/ relay panel (behind lower left side of dash) Nca Red Red/pnk S122 S131 (in engine harn, near top of cylinder 7) S134 S136 S138 S139 (backup lamp harn, near breakout to 16-pin conn, in left side of engine compt) Shift solenoid 1 Shift solenoid 2 Tan Tan/ red Tan/red Torque converter clutch solenoid Transmission fluid temperature sensor Vapor managment valve 6.8L, Engine Performance Wiring Diagram (4 of 4) for Ford F550 Super Duty 1999 List of elements for 6.8L, Engine Performance Wiring Diagram (4 of 4) for Ford F550 Super Duty 1999: 77 (a/t) (above brake pedal) brake pedal position (bpp) switch (behind left side of dash, above clutch pedal) clutch pedal position switch (m/t) (eng harn, near breakout to brake press switch) (engine harn, near breakout to 16-pin conn, left side of eng compt) s115 (in right side of engine compt) speed control servo/amplifier assembly (left rear side of engine compartment) canister vent solenoid (m/t) (top front of engine) cylinder head temperature (cht) sensor 5v ref volt Anti-lock brakes system Bpp sw Cam pos in Camshaft position sensor (cmp) (on front of of left cyl head) Canister vent Cyl head temp Digital transmission range (dtr) sensor (left side of transmission) Dpfe sens Epc 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 Fuse 5a G102 (left side of eng compt) G102 (left side of engine compt) G200 (bottom of left kick panel) Heated oxygen sensor (ho2s) 11 (on right exhaust manifold) Heated oxygen sensor (ho2s) 12 (rear of catalytic converter) Heated oxygen sensor (ho2s) 21 (on left exhaust manifold) Heater ctrl Hego 11 Hego 12 Hego 21 Hot at all times Hot in start Iac sol Ign coil 2 Ign coil 3 Ign coil 4 Ign coil 7 Ign coil 8 Ign coil 9 Junction box fuse/ relay panel (behind lower left side of dash) Kap b(+) Knock sensor Knock sensor (on rear of engine) Knock sensor shield Maf sens in Mass air flow (maf) sensor (in left front of eng compt) Nca Powertrain control module (pcm) (on left side of firewall) Pwr gnd Red Red/pnk S106 S108 S201 Sig return Tan Tan/red Tcc sol Tp sens in Tr3a (a/t) cpp (m/t) Vapor valve Vpwr Vss (+) Vss input
7.3L DI TURBO DIESEL 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram (1 of 3) for Ford F550 Super Duty 1999 List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram (1 of 3) for Ford F550 Super Duty 1999: 89 (behind lower right side of dash) (below left side of dash) data link connector (eng harn, near breakout to 40-pin conn, left side of dash) (left side of engine compt) (main harn, near breakout to 16-pin conn, center of dash) (on left side of firewall) powertrain control module (pia engine harness) 224 (a/t) 306 (m/t) 4x4 low range sw A/t Aux tach feed Auxiliary powertrain control module (apcm) Brake press sw Brake pressure switch Brake warning ind Bus (+) Bus (-) C243 C250 C251 C253 Cam pos sens Ccs sol Clutch pedal position (cpp) switch (behind left side of dash, above clutch pedal) Diesel fuel pump motor (near fuel tank) Dtr-tr1 Ebp sens Engine oil temperature (eot) sensor (top front of engine) Eot Fuel heater (on center of engine) Fuel htr Fuel pump pwr Fuel pump relay Fuel reset ind Fuse 10a Fuse 20a Fuse 30a G104 (left rear of engine compt) G200 (bottom of left kick panel) Gen pwr sw Gen scan tool in Glow plug monitor Hot at all times Hot in run or start I/p relay box Iat Idle validation sw Idle validation switch (open at idle) (lower left side of dash) Idm power relay Inertia fuel shutoff switch (behind right kick panel) Injection pressure regulator (top center of engine) Instrument cluster Instrument cluster system Intake air temperature sensor (left side of engine compt, behind air cleaner) Junction box fuse/ relay panel Lo current sense M/t Mal- function ind Mil ind Nca Neutral gear sw Not used Pcm diode Pcm power relay Power distribution box Red Red s123 S102 S103 S141 (engine harn, near breakout to pcm conn) S154 S158 S179 S213 S217 S219 S221 S250 Speed/tach grd Ss1 Ss2 Starting/ charging system Tcil Tcs(a/t)/cpp(m/t) Tft Tp sens Wait to start ind Wastegate control solenoid (in center of engine) Water in fuel ind 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram (2 of 3) for Ford F550 Super Duty 1999 List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram (2 of 3) for Ford F550 Super Duty 1999: 77 (backup lamp harn, near breakout to 16-pin conn, left side of eng compt) (eng ctrl harn) (engine harness) (in pia engine harn) (in pia engine harness) (left side of engine compt) (main harn, near air bag diag mod) (on left side of firewall) A/c head pres sw Accelerator pedal position sensor (under left side of dash, above brake pedal) Accl pos sens Act sens Air charge temperature sensor (center front of engine) Air condi- tioning system Baro sens Barometric pressure (baro) sensor (below left side of dash) Bpp sw Camshaft position (cmp) sensor (lower front center of engine) Charge ind Cid sig Cmp rtn Cruise control system Data output link Diesel elect drv Dtr-tr2 Dtr-tr3a Dtr-tr4 Epc sol Epr Exhaust back pressure (ebp) sensor (center rear of engine) Exhaust pressure regulator (top center of engine) Fuel deliv sig Fuel pump rly Fuel pump sender G102 Gen pwr Glow plug ctrl Icp sens Idm enable out Injection control pressure (icp) sensor (on top left side of engine, right of alternator) Instrument cluster system Ipr sens Manifold absolute pressure (map) sensor (on right side of firewall) Map sens Nca Not used Oss sens Output shaft speed sensor (on top of trans) Overdrive cancel switch Pcm to rly Power take off (supp by body bldr) Powertrain control module Pwr Pwr gnd Pwr in Red S106 S114 S128 S139 S151 S153 S208 S222 (main harn, near breakout to 2-pin conn, left side of dash) Sig rtn Speed ctrl sw Starting/ charging system Take off pwr in Tcc Tcil Tcs Tss sens Turbine shaft speed (tss) sensor (on top of trans) Vref Vss (+) Wait to start ind Wcs sol 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram (3 of 3) for Ford F550 Super Duty 1999 List of elements for 7.3L DI Turbo Diesel, Engine Performance Wiring Diagram (3 of 3) for Ford F550 Super Duty 1999: 67 (backup lamp harn, near breakout to 16-pin conn left side of eng compt) (bottom of left kick panel) g202 (left side of engine compt) (left side of engine compt) g102 (on engine block) (right side of eng compt) 4r100 transmission Brake pedal position switch (behind left side of dash, above brake pedal) C241 C243 C253 Cid sig in Coast clutch solenoid Digital transmission range (dtr) sensor (left side of transmission) Elect feed back sig Electronic pressure control solenoid Fuel delivery sig Fuel gauge sender (at fuel tank) Fuel inj feed Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 Fuel injectors Fuse 5a G132 Generic electronic module (gem) Glow plug relay (top right side of engine) Glow plugs Hot at all times Inj shield gnd Injector driver module Instrument cluster Junction box fuse/ relay panel Junction box fuse/relay panel Manifold intake air heater (58 amp) Manifold intake air heater relay (center of engine compt) Nca P, 2, 1 P, r, 2 P, r, 2, 1 P, r, n Pwr gnd Pwr in Red S108 (eng harn near brake pressure switch) S115 S138 S148 S149 S155 (pia engine harness) S156 (pia engine harness) S211 Shift solenoid 1 Shift solenoid 2 Sig rtn Signal return Speed control servo/ amplifier assembly Speedo- meter Tan Tan/red Torque converter clutch solenoid Transmission fluid temperature sensor
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Back-up Lamps Wiring Diagram for Ford F550 Super Duty 1999: 27 (1999) (2000 only) (2000) (a/t) (left side of engine compt, near battery junction box) tow trailer relay block (m/t) (rear lamp harn, left rear of vehicle) s426 (w/ dual rear wheels) Back-up lamp switch (on top left side of transmission) C242b C243 Central junction box (lower left side of dash) Digital transmission range (dtr) sensor (on left side of transmission) Exterior lights circuit Fuse 10a G104 (rear of left front fender) G416 (left rear of vehicle) Hot in run Left back-up lamp Right back-up lamp S144 s102 (2000) S206 S402 s404 (w/o dual rear wheels) S404 Trailer back-up lamps relay W/ trailer tow package W/o trailer tow package Exterior Lamps & Trailer connector Wiring Diagram (1 of 2) for Ford F550 Super Duty 1999 List of elements for Exterior Lamps & Trailer connector Wiring Diagram (1 of 2) for Ford F550 Super Duty 1999: 75 (1999) (1999) (2000) (2000 lariat) left side of (center of windshield header) s903 (2000) (behind center of dash) g206 (engine harn, left side of dash) s110 (engine harn, left side of dash) s112 (left rear of cab) g308 (marker lamp harn) 87a Battery junction box (in left side of engine compt, on top of wheelwell) Brake pedal position switch (behind left side of dash, above brake pedal) C242 C242a C242b C243 C250b C251 Cab & chassis Cab marker lamps Cargo/high mount stop lamp Central junction box (behind lower left side of dash) Door locks system Feed (under dash) Flasher relay (i/p relay block) Fuse 10a Fuse 15a Fuse 20a Fuse 7.5a G101 (front of right front fender) G104 (rear of left front fender) G206 (behind center of dash) G416 (left rear of vehicle) Hazard switch Head Hot at all times Hot in run I/p relay block (behind dash, near instrument panel) Instrument cluster Lamp feed (left rear of chassis) Left Left front park/turn lamp Left front side marker lamp Left rear park/stop/ turn lamp Left tail lamp Main light switch Multi- function switch Off Park Park lamp relay Pickup Relay box (center of dash) Right Right front park/turn lamp Right front side marker lamp Right rear park/stop/ turn lamp Right tail lamp S102 S107 (engine harn, left side of engine compt) S109 S180 S215 (main harn, behind dash) S217 S217 (2000) S240 (main harn, behind left side of dash) S300 S404 S904 S920 (2000 lariat) Solid state Trailer illumination feed (under dash) Trailer running lamp relay Turn switch Warning systems Windshield header) s921 Exterior Lamps & Trailer connector Wiring Diagram (2 of 2) for Ford F550 Super Duty 1999 List of elements for Exterior Lamps & Trailer connector Wiring Diagram (2 of 2) for Ford F550 Super Duty 1999: 54 (1999) (2000) (left rear of chassis) rpo trailer tow adapter (7 wire) (left rear of chassis) trailer/camper adapter (left side of engine compt, near battery junction box) tow trailer relay block (rear lamp harness, center rear of vehicle) s417 (rear of left frt fender) g104 (trailer feed harn, under rear of vehicle) (trailer feed harn, under rear of vehicle) s432 Battery junction box (in left side of engine compt, on top of wheelwell) C242b C243 Central junction box (behind lower left side of dash) Exterior lights system (backup lamps) Fuse 10a Fuse 30a G104 (rear of left frt fender) G206 (behind center of dash) G416 (left rear of vehicle) Hot at all times Hot in run I/p relay block (near center of dash) Left front side marker lamp Left license lamp Left rear park/stop/ turn lamp Left rear side marker lamp License lamp Nca Rear body marker lamps Red Right front side marker lamp Right license lamp Right rear park/stop/ turn lamp Right rear side marker lamp S102 S235 S290 S401 S402 S403 S404 S417 (rear lamp harness, center rear of vehicle) S418 (license lamp harn, center rear of vehicle) S430 S431 S433 Trailer backup lamps relay Trailer battery charge relay Trailer battery feed (under dash) Trailer electronic brakes feed (under dash) W/ dual rear wheels W/ rear bumper W/o dual rear wheels W/o rear bumper
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 3) for Ford F550 Super Duty 1999 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Ford F550 Super Duty 1999: 57 (diesel) battery 5.4l 5.4l, 6.8l 6.8l 87a A/c clutch diode A/c compressor clutch solenoid Bare Battery Blower motor resistor Brake fluid level switch Crankshaft position sensor shield Data link connector Diesel Diesel fuel pump motor Engine compartment lamp Exhaust pressure regulator Fuel pump resistor Fuel pump speed relay G101 (front of right front fender) G102 (left side of engine compartment) G104 (rear of left front fender) G110 (left front of engine) G203 (right kick panel) Gas High pitch horn High to low relay I/p relay block Injector driver module Instrument cluster Knock sensor shield Left front park/ turn lamp Left front side marker lamp Left headlamp Low pitch horn Low to high relay Mass air flow sensor Nca Pcm power relay Power distribution box Powertrain control module Radio Right front park/ turn lamp Right front side marker lamp Right headlamp S145 (engine harn, near air cleaner) S147 (engine harn, near breakout to pcm) S250 (engine harn, near brake fluid reservoir) S258 (main harn, behind right kick panel) Speed control servo/ amplifier assembly Trailer backup lamps relay Trailer battery charge relay Transfer case shift relay box Vacuum pump W/ electronic shift ctrl Windshield wiper motor Windshield wiper pump motor Ground Distribution Wiring Diagram (2 of 3) for Ford F550 Super Duty 1999 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Ford F550 Super Duty 1999: 52 Adapter Airbag diagnostic module Auxiliary powertrain control module Brake pedal position switch Data link connector Diesel Digital transmission range sensor Engine coolant temperature sender Flasher relay Fuel tank assembly G203 (right kick panel) G206 (behind center of dash) G416 (w/ dual rear wheels) (left rear of vehicle) G416 (w/o dual rear wheels) (left rear of vehicle) Generic electronic module I/p relay block Instrument cluster Junction box fuse/ relay panel Left backup lamp Left front side marker lamp Left license lamp Left rear park/ stop/ turn lamp Left rear side marker lamp Left tail lamp Main light switch Nca Overhead trip computer module Passenger airbag deactivation switch Powertrain control module Rear body marker lamps Right backup lamp Right front side marker lamp Right license lamp Right rear park/ stop/ turn lamp Right rear side marker lamp Right tail lamp S201 (main harn, near breakout to instrument cluster) S202 (main harn, near breakout to airbag diagnostic module) S218 (main harn, near breakout to instrument cluster) S255 (main harn, near breakout to transfer case) S402 (rear lamp harn, near breakout to rear marker lamps) S403 (license lamp harn, center rear of vehicle) S432 (trailer feed harn) Shift lock actuator Speed control/ horn switch assembly Trailer ground feed Trailer running lamp relay Trailer/ camper adapter Transfer case W/ adapter W/ pickup box W/o pickup box Ground Distribution Wiring Diagram (3 of 3) for Ford F550 Super Duty 1999 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Ford F550 Super Duty 1999: 43 4 wheel drive mode switch 87a All lock relay All unlock relay Blend door actuator Cab marker lamp Cargo/ high mount stop lamp Cigar lighter Daytime running lamp relay 1 Daytime running lamp relay 2 Daytime running lamp relay block Driver seat regulator control switch Function selector switch G206 (behind center of dash) G308 (crew cab) (left rear of cab) G308 (super cab, regular cab) (left rear of cab) Glove compartment lamp Left door ajar switch Left front door courtesy lamp Left front window control switch Left power door lock switch Left rear door ajar switch Left rear window control switch Nca Power mirror switch Power point Radio Right door ajar switch Right front door courtesy lamp Right front window control switch Right power door lock switch Right rear door ajar switch Right rear window control switch S233 (main harn center of dash) S257 (main harn, behind right kick panel) S501 (main harn, near breakout to left front door lock motor) S904 (marker lamp harn) Seat belt switch Super cab w/ rke Trailer ground feed Transfer case rke relay box W/ rke W/o rke
HEADLIGHTS Headlights Wiring Diagram, with DRL for Ford F550 Super Duty 1999 List of elements for Headlights Wiring Diagram, with DRL for Ford F550 Super Duty 1999: 40 87a C230 C242 C243 C253 C273 Daytime running lamps relay 1 Daytime running lamps relay 2 Daytime running lamps relay block (behind right side of dash) Daytime running lamps resistor (on left front side of engine compt) Fuse 10a Fuse 15a Fuse 30a G101 (front of right front fender) G104 (rear of left front fender) G206 (behind center of dash) Head Hi-beam indicator Hot at all times Hot in run Instrument cluster Junction box fuse/relay panel Left headlamp Main light Multi- function switch Near center of dash) Off Park Pass Power distribution box Right headlamp S102 S121 (engine harness, near breakout to power distribution box) S180 S206 S214 S217 S220 (main harness, near breakout to central junction box) S257 Switch Headlights Wiring Diagram, without DRL for Ford F550 Super Duty 1999 List of elements for Headlights Wiring Diagram, without DRL for Ford F550 Super Duty 1999: 31 (engine harness, near breakout at left side of dash) s113 C230 C242 C253 C273 Distribution box) Fuse 10a Fuse 15a Fuse 30a G101 (front of right front fender) G104 (rear of left front fender) G206 (behind center of dash) Head Hi-beam indicator Hot at all times Instrument cluster Junction box fuse/relay panel Left headlamp Main light Multi- function switch Off Park Pass Power distribution box Right headlamp S102 S180 S214 S217 S220 (main harness, near breakout to central junction box) Switch
HORN Horn Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Horn Wiring Diagram for Ford F550 Super Duty 1999: 18 C1067 C241 C242 C243 Fuse 15a G101 (front of right front fender) Generic electronic module (behind left side of dash) High pitch horn (right front of engine compt) Horn relay Horn switch Hot at all times Junction box fuse/ relay panel (behind lower left side of dash) Low pitch horn (right front of engine compt) Nca S180 Speed control servo/amplifier assembly (right side of engine compt) Speed control switch return Speed control/ horn switch assembly
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Instrument Cluster Wiring Diagram for Ford F550 Super Duty 1999: 92 (behind center of dash) g206 (conn a) (conn b) (conn c) (engine harn, left side of dash) s129 (main harness, near breakout to instrument cluster) s201 (rear of left front fender) 22k ohms 470 ohms 4x4 high ind 4x4 low ind 5.6k ohms A 5.4l A10 A11 Airbag ind Anti-lock brake ind Anti-lock brake system B 6.8l B10 B11 B12 B13 B14 B16 Brake warning ind C10 C1027 C11 C12 C239 C241 C242 C243 C250 C251 C253 Charge ind Charging system Coolant temperature/ oil pressure indicator Daytime running lamps ind Diesel Door ajar ind Eng cool temp gauge Eng oil press gauge Engine controls system Engine coolant temperature sender (on front of engine) Engine coolant temperature sender (on top left front of engine) Engine oil pressure switch (on top center rear of engine) Exterior lights system Fasten seat belt ind Fuel gauge Fuel reset ind Fuel tank assembly Fuse 10a Fuse 5a G104 G104 (rear of left front fender) G206 (behind center of dash) Gas Generic electronic module (behind lower left side of dash) Ground Headlights system Hi beam ind Hot at all times Hot in start or run Illumination Instrument cluster Interior lights system Junction box fuse/ relay panel Keep alive Left turn ind Malfunction ind Microprocessor Overhead console Powertrain control module (on left side of firewall) Red Right turn ind S102 S201 S208 (main harn, center of dash) S211 S217 S289 Tach select 1 Tach select 2 Tachometer Transmission controls system V power Vss+ (speedometer) Wait to start ind Water in fuel ind Overhead Console Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Overhead Console Wiring Diagram for Ford F550 Super Duty 1999: 24 Anti-lock brakes system C1027 C243 Computer data lines Data out fuel flow Engine controls system Fuel tank assembly Fuel tank sender Fuse 10a G206 (behind center of dash) Hot in start or run Ill feed Instrument cluster system Interior lights system Iso link Junction box fuse/ relay panel Overhead trip computer module (in roof, at front center of cab) Powertrain control module (on left side of firewall) S201 S208 (main harn, center of dash) S213 Speed sensor+ Speed sensor- Warn lamps
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Courtesy Lamps Wiring Diagram for Ford F550 Super Duty 1999: 37 (main harn, left rear of cab) (crew cab) s906 (main harn, left rear of cab) s905 (not used) (rear of left front fender) g104 C241 C242 C243 Cargo/high mount stop lamp Dome Engine compartment lamp Front dome lamp Front map lamps Fuse 14 10a Fuse 4 10a G206 (behind center of dash) G308 (left rear of cab) Generic electronic module (gem) Glove compartment lamp Hot at all times Interior lamp relay Junction box fuse/relay panel (behind lower left side of dash) Left front door courtesy lamp (w/ rke only) Main light switch Mirrors system Other Rear dome lamp Rear map lamps Regular cab Right front door courtesy lamp (w/ rke only) S102 S218 S229 (main harn, behind top left side of dash) S233 S257 S300 S301 (super cab) (main harn, near left front seat) Super and regular w/o power mirrors Instrument Illumination Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Instrument Illumination Wiring Diagram for Ford F550 Super Duty 1999: 38 4 wheel drive mode switch Accessory delay relay C242 C273 Circuit breaker 25 30a Climate control illumination Fuse 7 5a G206 (behind center of dash) G308 (left rear of cab) Head Hot at all times Instrument cluster Junction box fuse/relay panel (behind lower left side of dash) Left front window control switch Left power door lock switch Left rear window control switch Main light switch Nca Off Overhead trip computer (otc) module Power distribution box (in left side of engine compt, on top of wheelwell) Power mirror switch Pulse width dimmer module Radio Right front window control switch Right power door lock switch Right rear window control switch S201 S215 (main harn, near customer access connector breakout) S216 (main harn, behind top left side of dash) S218 S227 (main harn, lower center of dash) S233 S290 S300 S501 Speed control/ horn switch assembly Steering wheel illumination
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 4) for Ford F550 Super Duty 1999 List of elements for Power Distribution Wiring Diagram (1 of 4) for Ford F550 Super Duty 1999: 49 (diesel only) (diesel w/ single gen. only) (engine harn, left rear of engine compt) s109 (engine harn, near breakout to power distribution box) s118 (in backup lamp harn, left rear of engine compt) s251 Air bag diagnostic module Anti-lock brake system module Blower motor relay Dash relay block Daytime running lamps resistor Driver's seat regulator control switch From a fuse 23 (diagram 1 of 4) Fuel pump relay Fuse 10a Fuse 20a Fuse 25a Fuse 30a Fuse 40a Fuse 5a (diesel w/ twin gen. only) Fuse 60a Generator/ voltage regulator (diesel) Generator/ voltage regulator (gasoline) Generator/ voltage regulator (secondary: diesel w/ twin generators) Glow plug relay High to low relay Idm power relay (diesel) Left battery (diesel only) Low to high relay Nca Pcm power relay Power distribution box Power distribution box (left rear of engine compartment) Power point Radio Red Right battery Starter motor Starter motor relay To fuse 17 (diagram 1 of 4) To fuse 26 (diagram 2 of 4) To fuse 30 (diagram 2 of 4) Trailer backup lamps relay Trailer battery charge relay Trailer brakes feed (taped in harness) Trailer running lamps relay Trailer tow relay Transfer case shift relay Windshield wiper motor Wiper run/ park relay Power Distribution Wiring Diagram (2 of 4) for Ford F550 Super Duty 1999 List of elements for Power Distribution Wiring Diagram (2 of 4) for Ford F550 Super Duty 1999: 57 (engine harness, pia diesel harness) s154 (main harn, behind left side of dash) s210 (main harn, behind left side of dash) s212 (main harn, center of dash) s230 (main harn, lower left side of dash) s214 Acc Accessory delay relay All lock relay All unlock relay C243 Circuit breaker 30a Coil on plug 1 Coil on plug 10 Coil on plug 2 Coil on plug 3 Coil on plug 4 Coil on plug 5 Coil on plug 6 Coil on plug 7 Coil on plug 8 Coil on plug 9 Driver's unlock relay From b fuse 4 (diagram 1 of 4) From pcm power relay (diagram 1 of 4) Fuel heater Fuse 15a Fuse 20a Fuse 30a Fuse 30a (5.4l gasoline) Fuse 30a (6.8l gasoline) Fuse 30a (diesel) Fuse 50a Ignition switch Junction box fuse/relay panel Junction box fuse/relay panel (lower left side of dash) Lock Main light switch Multi- function switch Nca Off Park lamp relay Power distribution box (left rear of engine compartment) Radio capacitor 1 Radio noise capacitor 2 Rke relay box Run S130 (engine harn, near throttle body) S135 (engine harness, right side of engine block) S179 (engine harn, left side of engine compartment) Start To fuse 10 (diagram 4 of 4) To fuse 13 (diagram 3 of 4) To fuse 19 (diagram 3 of 4) To fuse 20 (diagram 4 of 4) To fuse 22 (diagram 4 of 4) To fuse 27 (diagram 4 of 4) Wastegate solenoid control Power Distribution Wiring Diagram (3 of 4) for Ford F550 Super Duty 1999 List of elements for Power Distribution Wiring Diagram (3 of 4) for Ford F550 Super Duty 1999: 44 (main harness, top left side of dash) s213 Accessory delay relay Auxiliary powertrain control module (diesel) Brake pedal position switch Brake pressure switch C242 C243 C250 C251 Cigar lighter Clutch pedal position switch Dash relay block Data link connector Engine compartment lamp Flasher relay From fuse 22 (power distribution box) (diagram 2 of 4) From fuse 3 k (diagram 3 of 4) From h fuse 30 (diagram 2 of 4) Front map lamp Fuse 10a Fuse 15a Fuse 20a Fuse 5a G200 (left kick panel) Generic electronic module Generic electronic module (gem) Glovebox light Horn relay Idle validation switch (diesel) Instrument cluster Interior lamp relay Junction box fuse/relay panel (lower left side of dash) Overdrive cancel switch Overhead trip computer module Power mirror switch Power take-off (taped in harness) Powertrain control module Rear lamp S211 (main harn, top left side of dash) S229 (main harn, top left side of dash) S242 (main harness, near breakout to customer access) S290 (main harness, near breakout to customer access) S906 (main harn, left rear of cab) To fuse 4 (diagram 3 of 4) Power Distribution Wiring Diagram (4 of 4) for Ford F550 Super Duty 1999 List of elements for Power Distribution Wiring Diagram (4 of 4) for Ford F550 Super Duty 1999: 50 (engine harn, left rear of engine compt) s124 (engine harness, near breakout to power distribution box) (main harn, left side of dash) s206 (main harn, left side of dash) s235 A/t Air bag diagnostic module Anti-lock brake system module Backup lamp switch Blend door actuator Blower motor relay C100 C1012 C1067 C115 C166 C236 C242 C243 Clutch pedal position switch jumper Customer access (taped in harness) Dash relay block Daytime running lamp relay 2 Daytime running lamp relay block Digital transmission range sensor Flasher relay From ignition switch (diagram 2 of 4) Function selector switch Fuse (not used) Fuse 10a Fuse 15a Fuse 5a Generic electronic module (gem) Junction box fuse/relay panel (lower left side of dash) M/t Main light switch Passenger's air bag deactivation switch Power distribution box Radio S119 S203 (main harn, center of dash) Shift lock actuator Speed control module Tan/red Trailer battery charge relay Trailer tow relay Vacuum hublock solenoid Vacuum pump (diesel) Washer pump relay Wiper hi/lo relay Wiper run/ park relay
POWER DOOR LOCKS Power Door Locks Wiring Diagram, with Remote/Keyless Entry for Ford F550 Super Duty 1999 List of elements for Power Door Locks Wiring Diagram, with Remote/Keyless Entry for Ford F550 Super Duty 1999: 36 (main harn, center of dash) s224 (main harn, center of dash) s232 87a All lock relay All unlock relay C247 C274 Driver unlock relay Exterior lights system Fuse 15a Fuse 20a G308 (left rear of cab) Generic electronic module (behind lower left side of dash) Head Hot at all times Interior lights system Left front door lock motor Left power door lock switch Left rear door lock motor (crew cab only) Lock Main light switch Off Park Park lamp relay Power distribution box (in left side of engine compt, on top of wheelwell) Right front door lock motor Right power door lock switch Right rear door lock motor (crew cab only) Rke relay box (in center of dash) S215 (main harn, behind dash) S228 (main harn, center of dash) S230 S231 (main harn, center of dash) S233 S300 Unlk Power Door Locks Wiring Diagram, without Remote/Keyless Entry Except Crew Cab for Ford F550 Super Duty 1999 List of elements for Power Door Locks Wiring Diagram, without Remote/Keyless Entry Except Crew Cab for Ford F550 Super Duty 1999: 13 Fuse 20a G308 (left rear of cab) Hot at all times Interior lights system Left front door lock motor Left power door lock switch Lock Power distribution box (in left side of engine compt, on top of wheelwell) Right front door lock motor Right power door lock switch S233 S300 Unlk Power Door Locks Wiring Diagram, without Remote/Keyless Entry-Crew Cab for Ford F550 Super Duty 1999 List of elements for Power Door Locks Wiring Diagram, without Remote/Keyless Entry-Crew Cab for Ford F550 Super Duty 1999: 17 (main harn, center of dash) s224 Fuse 20a G308 (left rear of cab) Hot at all times Interior lights system Left front door lock motor Left power door lock switch Left rear door lock motor Lock Power distribution box (in left side of engine compt, on top of wheelwell) Right front door lock motor Right power door lock switch Right rear door lock motor S228 (main harn, center of dash) S233 S300 Unlk
POWER MIRRORS Power Mirrors Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Power Mirrors Wiring Diagram for Ford F550 Super Duty 1999: 28 (left rear of cab) g308 Battery saver relay C240d C242a C242b Central junction box (behind lower left side of dash) Direct- ional control switch Down Except excursion Excursion Fuse 10a Fuse 15a Generic electronic module (behind lower left side of dash) Hot at all times Illum Interior lights system L/r Left Left power mirror Nca Power mirror switch Red Right Right power mirror S261 (body harn, near breakout to seat harn) S301 (1999) s906 (2000) S500 U/d
POWER SEATS 6-Way Power Seat Wiring Diagram for Ford F550 Super Duty 1999 List of elements for 6-Way Power Seat Wiring Diagram for Ford F550 Super Duty 1999: 21 (1999) (2000-01) Battery junction box (left side of engine compt) Driver seat motor assembly Driver seat regulator control switch Entire seat Except excursion w/ heated seats Excursion w/ heated seats Forward/reverse motor Front height motor Front of seat Fuse 18 fuse 108 30a Fwd G308 (left rear of cab) Hot at all times Nca Rear height motor Rear of seat Rwd S298 (2001) S300
POWER WINDOWS Power Windows Wiring Diagram, Crew Cab for Ford F550 Super Duty 1999 List of elements for Power Windows Wiring Diagram, Crew Cab for Ford F550 Super Duty 1999: 42 87a Acc delay relay Battery junction box C242 C243 C267 C510 C511 Central junction box Circuit breaker 25 30a Down sw input Fuse 10a Fuse 50a G206 (behind center of dash) G308 (left rear of cab) Generic electronic module Ground Hot at all times Interior lights system Left front power window motor Left front power window switch Left rear power window motor Left rear power window switch Left rear switch Left switch Lock out One tch dn hi One tch dn lo One touch down relay Otd sw input Otd switch Right front power window motor Right front power window switch Right rear power window motor Right rear power window switch Right rear switch Right switch S218 S229 S262 (body harn, near breakout under left front seat) S501 Shunt (0.015 ohms) Power Windows Wiring Diagram, Except Crew Cab for Ford F550 Super Duty 1999 List of elements for Power Windows Wiring Diagram, Except Crew Cab for Ford F550 Super Duty 1999: 35 87a Acc delay relay Battery junction box C242 C243 C267 C510 C511 Central junction box Circuit breaker 25 30a Down sw input Fuse 10a Fuse 50a G206 (behind center of dash) G308 (left rear of cab) Generic electronic module Ground Hot at all times Interior lights system Left power window motor Left power window switch Left switch One tch dn hi One tch dn lo One touch down One touch down relay Otd sw input Right power window motor Right power window switch Right switch S218 S226 (body main harn, near breakout to customer access) S229 S300 Shunt (0.015 ohms)
RADIO Radio Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Radio Wiring Diagram for Ford F550 Super Duty 1999: 34 Antenna C225 C242 C274 Fuse 20a Fuse 5a Fused ignition G202 (upper left kick panel) G206 (behind center of dash) Ground Hot at all times Hot in run or acc Ilumination Interior lights Junction box fuse/ relay panel (behind lower left side of dash) L front spkr (+) L front spkr (-) L rear spkr (+) L rear spkr (-) Left front speaker Left rear speaker Main light switch Nca Power Power distribution box (left side of engine compt) R front spkr (+) R front spkr (-) R rear spkr (+) R rear spkr (-) Radio Right front speaker Right rear speaker S258 S290
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Shift Interlock Wiring Diagram for Ford F550 Super Duty 1999: 14 Brake pedal position (bpp) switch (above brake pedal) C243 Fuse 15 5a Fuse 28 10a G206 (behind center of dash) Hot at all times Hot in run Junction box fuse/relay panel (behind lower left side of dash) S201 S205 (main harn, left of steering column) S206 S218 Shift lock actuator (in steering column) Solid state
STARTING/CHARGING Starting Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Starting Wiring Diagram for Ford F550 Super Duty 1999: 29 A/t Acc C1012 C243 Charging circuit Clutch pedal position switch (under left side of dash) Clutch pedal position switch jumper (behind left side of dash) Column) Digital transmission range (dtr) sensor (left side of transmission) Fuse 15a Fuse 50a Fuse link a (12 ga-gray) (near starter motor relay) G101 (front of right front fender) G110 (left front of engine) Ignition switch Junction box fuse/ relay panel (behind lower left side of dash) Left battery (diesel) Lock M/t Off Power distribution box (left side of engine compt) Red Right battery Run Sta Start Starter motor (lower right side of engine) Starter motor relay (right front inner fender panel, near battery) Tan/red
6.8L 6.8L, Charging Wiring Diagram for Ford F550 Super Duty 1999 List of elements for 6.8L, Charging Wiring Diagram for Ford F550 Super Duty 1999: 25 0hms Acc Battery C153 C154 C243 C250 Charge indicator Fuse 50a Fuse 5a Fuse link a (12 ga-gray) (near starter motor relay) Fuse link b (12 ga-gray) (near starter motor relay) G101 (front of right front fender) Generator Ignition switch Instrument cluster Junction box fuse/ relay panel (behind lower left side of dash) Lock Off Power distribution box (left side of engine compt) Red Run Start Starter motor Starter motor relay (behind battery)
7.3L DIESEL 7.3L Diesel, Charging Wiring Diagram, with Dual Generators for Ford F550 Super Duty 1999 List of elements for 7.3L Diesel, Charging Wiring Diagram, with Dual Generators for Ford F550 Super Duty 1999: 32 0hms Acc C1027 C185 C243 C250 Charge ind Fuse 10a Fuse 50a Fuse 5a Fuse link a (12 ga-gray) (near starter motor relay) Fuse link b (12 ga-gray) (near starter motor relay) G101 (front of right front fender) G110 (left front of engine) Generator/ voltage regulator (primary) Generator/ voltage regulator (secondary) Glow plug relay (left side of engine compt) Ignition switch Instrument cluster Junction box fuse/ relay panel (behind lower left side of dash) Left battery Lock Off Power distribution box (left side of engine compt) Powertrain control module (on left side of firewall) Red Right battery Run Start Starter motor Starter motor relay (behind battery) Steering column) s212 7.3L Diesel, Charging Wiring Diagram, without Dual Generators for Ford F550 Super Duty 1999 List of elements for 7.3L Diesel, Charging Wiring Diagram, without Dual Generators for Ford F550 Super Duty 1999: 28 (left side of engine compt) glow plug relay 0hms Acc C185 C243 C250 Charge indicator Fuse 10a Fuse 50a Fuse 5a Fuse link a (12 ga-gray) (near starter motor relay) Fuse link b (12 ga-gray) (near starter motor relay) G101 (front of right front fender) G110 (left front of engine) Generator Ignition switch Instrument cluster Junction box fuse/ relay panel (behind lower left side of dash) Left battery Lock Off Power distribution box (left side of engine compt) Red Right battery Run Start Starter motor Starter motor relay (behind battery)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Supplemental Restraints Wiring Diagram for Ford F550 Super Duty 1999: 43 (behind center of dash) Air bag diagnostic module (behind center side of dash) Air bag feed Air bag indicator Air bag return C223 C227 C239 C242 C243 C250 Clockspring assembly Computer data lines system Connector (dlc) Data link Data link (dlc) Deactivation Deactivation ind Driver air bag Fuse 10a Fuse 5a Fused b(+) Fused ignition G203 (right kick panel) Generic electronic module (gem) (behind center side of dash) Ground Hot at all times Hot in run Hot in run or start Indicator driver Instrument cluster Junction box fuse/ relay panel (behind lower left side of dash) Nca Ohm Passenger air bag Passenger air bag deactivation switch Pin shorting bar is engaged when module connector is disconnected (shorting bar is connected between the following pins: 1-15, 7-21, 8-22, 14-28) Power distribution box (left side of engine compt) S202 S203 S225 (dash harn, near breakout to data link connector) Shorting bar Tone request
TRANSMISSION 4WD Wiring Diagram for Ford F550 Super Duty 1999 List of elements for 4WD Wiring Diagram for Ford F550 Super Duty 1999: 64 1.1k ohms 3.9k ohms 4 wheel drive mode switch 4x2 sol 4x4 high ind 4x4 high range indicator 4x4 low ind 4x4 low range indicator 4x4 mode sw 4x4 sol Anti-lock brake system module (left front of engine compt) Auxiliary powertrain control module, clutch pedal position switch, idle validation switch, overhead trip computer, overdrive cancel switch Bpp sw input Brake pedal position switch (under left side of dash) C1040 C239 C247 C250 C253 C284 C285 Clutch pedal position switch, shift lock actuator, powertrain control module, anti-lock brake module Digital transmission range (dtr) sensor (left side of transmission) Fuse 10a Fuse 20a Fuse 30a G104 (left rear of engine compt) G200 (left kick panel) Generic electronic module (gem) (behind left side of dash) H2l rly ctrl High to low Hot at all times Hot in run Hot in run or start Ignition Illumination Instrument cluster Interior lights (instrument illumination) Junction box fuse/ relay panel (under left side of dash) L2h rly ctrl Low to high Neutral sw in Ohms Power distribution box (left side of engine compt) Red S124 S205 S206 S213 S250 S251 S255 Shift lock actuator, drl relay Shift motor Sw a input Sw b input Sw c input Sw d input Tod rly ctrl Torque on demand relay Transfer case assembly (below vehicle, behind transmission) Transfer case shift relay module (in engine compt, next to central junction box) Vacuum hublock solenoid (right side of engine compt) Vacuum pump, speed control module, back-up lamp switch
6.8L 6.8L, A/T Wiring Diagram for Ford F550 Super Duty 1999 List of elements for 6.8L, A/T Wiring Diagram for Ford F550 Super Duty 1999: 84 (engine ctrl harn, near battery junction box) s120 (engine harn, left side of dash) s122 (engine harn, near breakout to fuel injector) (engine harn, near breakout to pcm) (in back-up lamp harn) (left side of firewall) powertrain control module (pcm) (rear of engine compt) g123 (under 4r100 transmission 4wd circuit 4wd low Anti-lock brake system module Anti-lock brake system module (left front of engine compt) Auxiliary powertrain control module, clutch pedal position switch, idle validation switch, overhead trip computer, instrument cluster Boo Brake pedal position switch (under left side of dash) C1027 Ccs Center of dash) data link connector Cht Coast clutch control Cruise control, body computer, instrument cluster Cylinder head temperature (cht) sensor (top front of engine) Data Differential speed sensor (center of rear axle) Digital transmission range sensor (left side of transmission) Dlc (+) Dlc (-) Electronic pressure control solenoid Engine controls Epc Fuse 10a Fuse 20a Fuse 30a Fuse 5a G104 (left rear of engine compt) Ground Hot at all times Hot in run or start Iat Ignition coils, radio noise capacitor Intake air temperature sensor (on intake manifold) Junction box fuse/ relay panel (under left side of dash) Of dash) Overdrive cancel switch (end of transmission selector lever) Pcm power diode Pcm power relay Power distribution box (left side of engine compt) R p Red Red/ pnk Red/pnk S102 S106 S114 S115 (engine harn, left side of engine compt) S123 (eng harn, left side of dash) S132 S133 S138 S139 S179 S213 Shift control 1 Shift control 2 Shift lock actuator, gem, clutch pedal position switch Side of eng compt) Sig rtn Ss1 Ss2 Tcc Tcil Tcs Tft Throttle position (tp) sensor (on throttle body) Torque converter clutch solenoid Tr1 Tr2 Tr3 Tr4 Transmission fluid temperature sensor Vpwr Vref Vss in
7.3L DIESEL 7.3L Diesel, A/T Wiring Diagram for Ford F550 Super Duty 1999 List of elements for 7.3L Diesel, A/T Wiring Diagram for Ford F550 Super Duty 1999: 86 (engine harn, left side of dash) (engine harn, left side of engine compt) (in backup lamp harn) s139 (left side of firewall) powertrain control module (pcm) (main harn, center of dash) (rear of engine compt) g123 (under 4r100 transmission 4wd circuit 4wd low Accelerator position sensor (under left side of dash) Anti-lock brake system module Anti-lock brake system module (left front of engine compt) Aps Auxiliary powertrain control module Auxiliary powertrain control module, clutch pedal position switch, idle validation switch, overhead trip computer, instrument cluster Boo Brake pedal position switch (under left side of dash) C1027 Ccs Center of dash) data link connector Coast clutch control Cruise control, body computer, instrument cluster Data Differential speed sensor (center of rear axle) Digital transmission range sensor (left side of transmission) Dlc (+) Dlc (-) Electronic pressure control solenoid Engine controls Epc Fuel heater, wastegate solenoid control Fuse 10a Fuse 30a Fuse 5a G104 (left rear of engine compt) Ground Hot at all times Hot in run or start Iat Intake air temperature sensor (on intake manifold) Junction box fuse/ relay panel (under left side of dash) Of dash) Oss Output shaft speed sensor (top of transmission) Overdrive cancel switch (end of transmission selector lever) Pcm power diode Pcm power relay Power distribution box (left side of engine compt) R p Red Red/ pnk Red/pnk S102 S106 S114 S115 (engine harn, left side of dash) S123 S138 (in back-up lamp harn) S179 S213 S219 S221 Shift control 1 Shift control 2 Shift lock actuator, gem, clutch pedal position switch Side dash) s222 Side of eng compt) Sig rtn Ss1 Ss2 Tcc Tcil Tcs Tft Torque converter clutch solenoid Tr1 Tr2 Tr3 Tr4 Transmission fluid temperature sensor Tss Turbine shaft speed sensor (top of transmission) Vpwr Vref Vss in
WARNING SYSTEMS Warning Systems Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Warning Systems Wiring Diagram for Ford F550 Super Duty 1999: 58 (1999) (1999) (behind center of dash) g206 (2000) Air bag diagnostic module (in center of dash) Air bag input Bat C223 C239 C240a C240d C241 C242b C243 C273a C273b C274 Central junction box Crew cab Exterior lights system Fuse 10a Fuse 15a Fuse 5a G200 (left kick panel) (2000) G206 (behind center of dash) G308 (left rear of cab) Generic electronic module (gem)/ (behind left side of dash) Ground Head Hot at all times Hot in acc or run Hot in run or start Hot in start Ign Ign key warning Ignition key warning switch Input Left door ajar switch Left rear door ajar switch Lf door ajar Main light switch Nca Off Park Park/head input Rear door ajar Rf door ajar Right door ajar switch Right rear door ajar switch S201 S204 (in main harn, near breakout to air bag diagnostic module) S213 S215 S233 S257 S300 S501 Seat belt sw in Seat belt switch (in driver's seat belt buckle)
WIPER/WASHER Wiper/Washer Wiring Diagram for Ford F550 Super Duty 1999 List of elements for Wiper/Washer Wiring Diagram for Ford F550 Super Duty 1999: 46 (engine harness, left side of dash) s116 (rear of left front fender) g104 (top of left front wheelwell) power distribution box 100k ohms 3.3k ohms 4.08k 7.25k Brake/run relay C239 C243 Fuse 10a Fuse 30a G101 (front of right front fender) Generic electronic module (lower left side of dash) Hot at all times Hot in acc or run Int max Int min Interval delay/wash Junction box fuse/ relay panel (lower left side of dash) Multi- function switch Off Off 38.27k ohms Ohms Park Park sense Power distribution box (top of left front wheelwell) Red Run S102 S118 S119 S180 Signal return Tan/ red Tan/red Washer pump Washer pump relay Washer switch Windshield wiper motor Windshield wiper pump motor Wiper hi/lo relay Wiper mode select Wiper run/park relay Wiper speed Wiper switch
