'73-74 Bronco Power Distribution
IF THE IMAGE IS TOO SMALL, click it.
Repair Locations Grid:
Improved, corrected, & combined versions of
Seabiscuit's colorized diagrams. Connector faces, component locations, and technical oversight provided by
Viperwolf1. When printed at full scale, the diagrams can be combined into a continuous strip.
Before printing, click the image to make sure you have the largest version.
See also:
.
.
.
.
.
.
.
.
.
https://www.fleet.ford.com/truckbbas/non-html/1997/c37_39_p.pdfFor '79 & similar trucks, see:
http://www.supermotors.net/registry/24302/78593-2Index '73-74 Bronco Wiring
--------------------------------------------------
Components (search using CTRL&F4)
Alternator . . . . . . . A1-B1
Alternator Voltage Regulator . J1-K1
AM Radio . . . . . . . . D16
Ambient Switch . . . . . . E7
Ammeter . . . . . . . . B4
Auxilliary Fuel Tank Sender . J12
Backup Lamp, LHR . . . . . K15
Backup Lamp, RHR . . . . . K16
Backup Lamp Switch . . . . E14, F4
Ballast Resistor . . . . . E4
Battery . . . . . . . . D3-E3
Beam Select Switch . . . . D20
Blinker Switch . . . . . . E29-E30
Block Heater . . . . . . K32
Blower Motor . . . . . . G38
Blower Motor Resistor . . . D38
Blower Motor Switch . . . . C38
Brake Lamp, LHR . . . . . G33
Brake Lamp, RHR . . . . . G35
Brake Lamp Switch . . . . . C29
Brake Warning Lamp . . . . F6
Brake Warning Switch . . . . J6
Breakerless Ignition Module . K3
Capacitor, Noise Suppression . E2
Carburetor Valve . . . . . J5
Cigar Lighter . . . . . . E22
Coil . . . . . . . . . H4-J4
Constant Voltage Unit . . . C9
Coolant Temperature Gauge . . F8
Coolant Temperature Sender . . K8
CV Unit . . . . . . . . C9
Distributor . . . . . . . G3-K3
Dome Lamp . . . . . . . D17
Dual Brake Warning Switch . . J6
Emergency Signal Flasher . . E32
Emergency Signal Switch . . . G32
Emission Control Solenoid . . J5, G7
Engine Block Heater . . . . K32
Flasher, Emergency Signal . . E32
Flasher, Turn Signal . . . . C32
Front Fuel Sender . . . . . J12
Fuel Gauge . . . . . . . C10
Fuel Sender . . . . . . . J10, J12
Fuel Tank Selector Switch . . E11
Fuse 1 (20A) Blower . . . . A38
Fuse 2 (15A) Turn Wash Radio . B15
Fuse 3 (2A) Illumination . . B18
Fuse 4 (15A) Cigar Crtsy Rev . B23
Fuse 5 (20A) Hazards . . . . B32
Fuse Inline (7.5A) TRS Switch . C7
Fusible Link . . . . . . C3
Gauge, Ammeter . . . . . . B4
Gauge, Fuel . . . . . . . C10
Gauge, Oil Pressure . . . . F9
Gauge, Temperature . . . . F8
Generator . . . . . . . A1-B1
Hazard Signal Flasher . . . E32
Hazard Signal Switch . . . . G32
Headlamp, Left . . . . . . H19
Headlamp, Right . . . . . H20
Headlamp Dimmer Switch . . . D20
Headlamp Switch . . . . . C21-C22
Headlamp Switch Lamp . . . . J18
Heater, Block Immersion . . . K32
Heater Blower Switch . . . . C38
Heater Blower Motor . . . . G38
Heater Blower Resistor . . . D38
Heater Control Lamp . . . . E17
High-Altitude Solenoid Valve . J5
High-Beam Switch . . . . . D20
High-Beam Indicator Lamp . . G20
Horn . . . . . . . . . E18
Horn Switch . . . . . . . D19
ICVR . . . . . . . . . C9
Ignition Coil . . . . . . H4-J4
Ignition Module . . . . . K3
Ignition Resistor . . . . . E4
Ignition Switch . . . . . C6-D6
Immersion Heater . . . . . K32
Indicator Lamp, Brake Warning . F6
Indicator Lamp, L Turn . . . H29
Indicator Lamp, High-Beam . . G20
Indicator Lamp, R Turn . . . H30
Inline Fuse (7.5A) TRS Switch . C7
Instrument Cluster Lamp . . . H18
Instrument Cluster Voltage Reg. C9
Key Switch . . . . . . . C6-D6
Lamp, Backup, LHR . . . . . K15
Lamp, Backup, RHR . . . . . J16
Lamp, Brake, LHR . . . . . G33
Lamp, Brake, RHR . . . . . G35
Lamp, Brake Warning Indicator . F6
Lamp, Dome . . . . . . . D17
Lamp, Head, Left . . . . . H19
Lamp, Head, Right . . . . . H20
Lamp, Headlamp Switch . . . J18
Lamp, Heater Control . . . . E17
Lamp, High-Beam Indicator . . G20
Lamp, Instrument Cluster . . H18
Lamp, Left Turn Indicator . . H29
Lamp, License . . . . . . G37
Lamp, Map . . . . . . . C17
Lamp, Park, LHF . . . . . J22
Lamp, Park, LHR . . . . . G33
Lamp, Park, RHF . . . . . F22
Lamp, Park, RHR . . . . . G35
Lamp, PRNDL Illumination . . G18
Lamp, Reverse, LHR . . . . K15
Lamp, Reverse, RHR . . . . K16
Lamp, Right Turn Indicator . . H30
Lamp, Shifter Illumination . . G18
Lamp, Side Marker, LHF . . . K22
Lamp, Side Marker, LHR . . . G34
Lamp, Side Marker, RHF . . . H22
Lamp, Side Marker, RHR . . . G36
Lamp, Stop, LHR . . . . . G33
Lamp, Stop, RHR . . . . . G35
Lamp, Turn, LHF . . . . . J22
Lamp, Turn, LHR . . . . . G33
Lamp, Turn, RHF . . . . . F22
Lamp, Turn, RHR . . . . . G35
Lamp, Wiper Switch . . . . J18
License Lamp . . . . . . G37
Lighter Socket . . . . . . E22
Loop Ammeter . . . . . . B4
Main Fuel Tank Sender. . . . J10
Map Lamp . . . . . . . . C17
Marker Lamp, LHF Side . . . K22
Marker Lamp, LHR Side . . . G34
Marker Lamp, RHF Side . . . H22
Marker Lamp, RHR Side . . . G36
Module, Breakerless Ignition . K3
Motor, Heater Blower . . . . G38
Motor, Starter . . . . . . H3-J4
Motor, Windshield Wiper . . . J13
Motor, Washer Pump . . . . K13
Neutral Safety Switch . . . F4
Oil Pressure Gauge . . . . F9
Oil Pressure Sender . . . . K9
Park Lamp, LHF . . . . . . J22
Park Lamp, LHR . . . . . . G33
Park Lamp, RHF . . . . . . F22
Park Lamp, RHR . . . . . . G35
Park Neutral Position Switch . F4
Power Point . . . . . . . E22
PRNDL Illumination Lamp . . . G18
Radio . . . . . . . . . D16
Radio Capacitor . . . . . E2
Radio Speaker . . . . . . F15
Rear Fuel Sender . . . . . J10
Relay, Horn . . . . . . . F11
Relay, Starter . . . . . . D3
Resistor, Ignition Ballast . . E4
Resistor, Blower Motor . . . D38
Reverse Lamp, LHR . . . . . K15
Reverse Lamp, RHR . . . . . K16
Reverse Lamp Switch . . . . E14, F4
Sender, Fuel, Front . . . . J12
Sender, Fuel, Rear . . . . J10
Sender, Oil Pressure . . . . K9
Sender, Temperature . . . . K8
Shifter Illumination Lamp . . G18
Side Marker Lamp, LHF . . . K22
Side Marker Lamp, LHR . . . G34
Side Marker Lamp, RHF . . . H22
Side Marker Lamp, RHR . . . G36
Solenoid, Carburetor Emission . J5, G7
Solenoid, Vacuum Valve . . . G7
Speaker . . . . . . . . F15
Starter Motor . . . . . . H3-J4
Starter Relay . . . . . . D3
Stop Lamp, LHR . . . . . . G33
Stop Lamp, RHR . . . . . . G35
Stop Lamp Switch . . . . . C29
Switch, Ambient . . . . . E7
Switch, Backup Lamp . . . . E14, F4
Switch, Blinker . . . . . E29-E30
Switch, Blower Motor . . . . C38
Switch, Brake Lamp . . . . C29
Switch, Dual Brake Warning . . J6
Switch, Emergency Signal . . G32
Switch, Fuel Tank Selector . . E11
Switch, Hazard Signal . . . G32
Switch, Headlamp . . . . . C21-C22
Switch, Heater Blower . . . C38
Switch, High-Beam Dimmer . . D20
Switch, Horn . . . . . . D19
Switch, Ignition . . . . . C6-D6
Switch, Neutral Safety (PNP) . F4
Switch, Reverse Lamp . . . . E14, F4
Switch, Stop Lamp . . . . . C29
Switch, TRS . . . . . . . J7
Switch, Turn Signal . . . . E29-E30
Switch, Windshield Washer . . B13
Switch, Windshield Wiper . . B13
Temperature Gauge . . . . . F8
Temperature Sender . . . . K8
TRS Switch . . . . . . . J7
Turn Signal, LHF . . . . . J22
Turn Signal, LHR . . . . . G33
Turn Signal Flasher . . . . C32
Turn Signal Indicator, L . . E22
Turn Signal Indicator, R . . E23
Turn Signal, RHF . . . . . F22
Turn Signal, RHR . . . . . G35
Turn Signal Switch . . . . E29-E30
Vacuum Valve Solenoid . . . G7
Valve, Carburetor Solenoid . . C9
Voltage Regulator, Alternator . J1-K1
Voltage Regulator, Instruments C9
Water Temperature Gauge . . . F8
Water Temperature Sender . . K8
Windshield Washer Switch . . B13
Windshield Washer Pump Motor . K13
Windshield Wiper Motor . . . J13
Windshield Wiper Switch . . B13
Windshield Wiper Switch Lamp . J18
--------------------------------------------------
Connectors
C201 (Alternator) . . . . . A1-B2
C202 (Voltage Regulator) . . E1
C203 (Radio Capacitor) . . . D2
C205 (Ammeter) . . . . . . B4
C206 (Inline) . . . . . . A3
C207 (Battery ) . . . . . C3
C208 (Battery -) . . . . . E3
C209 (Distributor Cap) . . . G3, J3
C210 (Distributor) . . . . H3, K3
C211 (Starter Relay Battery) . C3
C212 (Starter Relay Starter) . D3
C213 (Starter Relay S) . . . D3
C214 (Starter Relay I) . . . D4
C215 (Ignition Coil) . . . . H4
C216 (Ignition Coil) . . . . H4
C217 (Ignition Coil) . . . . J4
C218 (Inline) . . . . . . F4, H8-H9
C219 (Ambient Switch) . . . E7
C220 (Inline) . . . . . . F7
C221 (Vacuum Valve Solenoid) . G7
C222 (Inline, NSS) . . . . E3-E4, E15
C223 (ICVR) . . . . . . . B9
C224 (ICVR) . . . . . . . B9
C225 (Temp Gauge) . . . . . E8
C226 (Temp Gauge) . . . . . G8
C227 (Temp Sender) . . . . J8
C228 (Oil Gauge) . . . . . E9
C229 (Oil Gauge) . . . . . G9
C230 (Oil Sender) . . . . . J9
C231 (Fuel Gauge) . . . . . B10
C232 (Fuel Gauge) . . . . . D10, G10
C233 (Inline) . . . . . . D23, D30-D31, H10
C234 (Rear Fuel Sender) . . . J10
C235 (Tank Select Switch) . . D11
C236 (Tank Select Switch) . . F11
C237 (Tank Select Switch) . . F11
C238 (Inline) . . . . . . H11
C239 (Front Fuel Sender) . . J11
C240 (Ignition Switch) . . . C6
C241 (Ignition Switch) . . . C6
C242 (Ignition Switch) . . . D6
C243 (Inline) . . . . . . G6, G15
C244 (TRS Switch) . . . . . J7
C245 (Starter) . . . . . . K2
C301 (Wiper Switch) . . . . C13
C302 (Inline) . . . . . . E13
C303 (Inline) . . . . . . F13
C304 (Wiper Motor) . . . . H13
C305 (Washer Pump) . . . . K14
C307 (Brake Warning Switch) . J6
C308 (L Backup Lamp) . . . . J15
C309 (R Backup Lamp) . . . . J16
C310 (Backup Switch) . . . . E15
C311 (H/L & Wiper Ill.) . . . J17
C312 (Heater Ill.) . . . . F17
C313 (Inline) . . . . . . B17
C314 (Dome Lamp) . . . . . D17
C315 (Map Lamp) . . . . . A17
C316 (Horn) . . . . . . . E18
C317 (Inline) . . . . . . G5
C318 (Carb Solenoid) . . . . H5
C319 (Speaker) . . . . . . E16
C320 (Inline) . . . . . . H15, C33-C37
C321 (Turn Signal Switch) . . F29-F30
C322 (Radio) . . . . . . C16
C401 (Headlamp Dimmer Switch) . E20
C402 (L Headlamp) . . . . . H19
C403 (R Headlamp) . . . . . H20
C404 (RHF Marker) . . . . . H21
C405 (RHF Turn) . . . . . F22
C406 (LHF Marker) . . . . . K21
C407 (LHF Turn) . . . . . J22
C408 (Headlamp Switch) . . . B21-C22
C409 (Hazard Switch) . . . . G32
C410 (A/C Outlet) . . . . . J32
C411 (Turn Flasher) . . . . C32
C412 (Hazard Flasher) . . . E32
C413 (Cigar Lighter) . . . . D22
C414 (Block Heater) . . . . J32
C415 (Brake Switch) . . . . C29
C501 (L Taillamp) . . . . . F33
C502 (LHR Marker) . . . . . F34
C503 (R Taillamp) . . . . . F35
C504 (RHR Marker) . . . . . F36
C505 (License Lamp) . . . . F37
C506 (Blower Switch) . . . . C38
C507 (Blower Switch) . . . . C38
C508 (Blower Resistor) . . . D38
C509 (Blower Motor) . . . . E38
--------------------------------------------------
Grounds
G201 (Voltage Regulator) . . H1
G202 (Block) . . . . . . E3
G204 (Rear Fuel Tank) . . . K10
G205 (Front Fuel Tank) . . . K11
G206 (L Valve Cover) . . . . K7
G301 (Instrument Panel) . . . K17
G302 (W/S Frame) . . . . . K17
G303 (Wiper Motor) . . . . K13
G401 (L Core Support) . . . K19, K22
G402 (R Core Support) . . . K21, G22
G501 (LHR Side Marker) . . . K34
G502 (RHR Side Marker) . . . K36
G503 (L T/G) . . . . . . K37
G504 (Blower Case) . . . . K38
--------------------------------------------------
Splices
S201 (Starter Relay) . . . . C2
S202 (Ignition Switch) . . . A5-A15
S203 (Ignition Switch) . . . E5
S204 (Ignition Switch) . . . A4-A21
S205 (Ignition Switch) . . . E7
S301 (Steering Column) . . . G18
S302 (Headlamp Switch) . . . C15
S401 (Headlamp Dimmer Switch) . E20
S402 (Headlamp Dimmer Switch) . F20
