Wiring Diagrams — Ford Bronco 1987-1991

Technical Reference

Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.

Wiring Diagrams

• Ford 3G Alternator Wiring Diagram - Mega Fuse, Charge Lamp & Wire Colors
  This document is a color-coded wiring diagram for a Ford 3G alternator charging system. It shows the alternator's internal components — the stator, rectifier (diode bridge), and voltage regulator with its 'sensing and…
• 1973-1974 Ford Point-Type Ignition System Circuit Diagram - Coil & Distributor
  This document is a labeled schematic diagram of a typical conventional point-type ignition system circuit as used on 1973-1974 vehicles. The diagram illustrates the complete ignition circuit, distinguishing between the…
• Ford 4-Terminal Starter Relay Wiring Diagram - S & I Terminals, Coil & Starter
  This is an illustrated wiring diagram showing how a Ford 4-terminal starter relay (fender-mounted solenoid) connects into the starting and ignition system. The diagram uses photographs of the actual components: the…
• Ford 4-Terminal Starter Solenoid Wiring Diagram - S & I Terminal Functions
  This document is an annotated photograph explaining the wiring of a Ford 4-terminal starter solenoid (starter relay). The image shows the solenoid mounted on its bracket with callouts identifying each connection point…
• KC Driving Lights & LED Light Bar Relay Wiring Diagram - Ford Bronco Aux Lights
  This document is a hand-drawn/computer-drawn wiring diagram for adding auxiliary lighting — KC driving lights and an LED light bar — to a vehicle, uploaded to a 1991 Ford Bronco gallery. It shows two standard 4/5-pin…
• 1986-95 Ford V8 Truck Speed Density EEC-IV Pinout Wiring Diagram
  This document is a wiring/pinout schematic for the Ford EEC-IV Speed Density fuel injection system as used on 1986-95 V8 trucks. It shows connector drawings and EEC processor pin assignments for the main engine sensors…
• 1990 Ford Bronco Speed Control Wiring Diagram 31-2 - Cruise Servo & Amplifier
  This document is page 31-2 of a Ford factory wiring diagram (EVTM-style) covering the Speed Control (cruise control) system for gasoline engines. It shows the speed control servo assembly, including the modulating…
• 1990 Ford Bronco Speed Control Wiring Diagram 31-1 - Cruise Control Circuit
  This is page 31-1 of a Ford wiring diagram covering the Speed Control (cruise control) circuit, uploaded as applying to a 1990 Ford Bronco. The diagram traces power from two fuse panel sources: Fuse 6 (15A, hot in…
• Ford EEC-IV Self-Test Connector Diagram - STO, STI, SIGRTN & Fuel Pump Pins
  This document is a labeled diagram of the Ford EEC-IV diagnostic Self-Test connector (STO) and the separate single-pin Self-Test Input (STI) connector. The larger multi-cavity connector is drawn in gray with four…
• 1995 Ford Bronco 5.0L Engine Controls Wiring Diagram - MAP, HO2S, PCM (24-6)
  This is page 24-6 of the 1995 Ford Bronco factory wiring diagrams (EVTM), covering the Engine Controls circuit for the 5.0L engine. The diagram shows wiring between the Powertrain Control Module (PCM), the Manifold…
• 1990 Ford Bronco Courtesy Lamps Wiring Diagram 89-2 - Dome & Cargo Lamp Circuit
  This document is page 89-2 of a Ford factory wiring diagram covering the Courtesy Lamps circuit for a Bronco equipped with a cargo lamp. Power comes from fuse 8 (15A) in the fuse panel (referenced to pages 12-3 and…
• 1990 Ford Bronco MLPS Connector Pinout Diagram - E4OD Wire Colors & Circuits
  This document is a connector face diagram for a Ford Manual Lever Position Sensor (labeled in the scan as "MANUAL LEVEL POSITION SENSOR"), the transmission range sensor used with the E4OD automatic transmission. The…
• 1990 Ford Bronco Connector Pinouts: MLPS, Main Light & Tailgate Window Switch
  This document is page 150-14 from a Ford connector faces/pinout charts reference, showing connector face drawings and pin/wire identification for three components: the Main Light Switch, the Manual Level Position…
• 1990 Ford Bronco Instrument Cluster Connector Pinout C250 & C251 (150-12)
  This document is page 150-12, "Connector Faces/Pinout Charts," from a Ford factory electrical/vacuum troubleshooting manual, showing the two instrument cluster connectors (C250 and C251) for gasoline-engine vehicles…
• 1995 Ford Bronco Warning Chime Module C280 Connector Pinout & Wire Colors (66-2)
  This document is page 66-2 of the 1995 Ford Bronco electrical/wiring manual covering the Warning Chime system. It shows the connector face diagram for connector C280 (gray), which plugs into the Warning Chime Module…
• 1995 Ford Bronco Warning Chime Wiring Diagram (66-1) - Seat Belt & Key Buzzer
  This is page 66-1 of the 1995 Ford Bronco electrical and vacuum troubleshooting manual (EVTM), showing the Warning Chime circuit wiring diagram. It documents the solid-state Warning Chime Module with its seven pins…
• Ford Duraspark II Breakerless Ignition Wiring Diagram - Primary & Secondary
  This document is a pictorial wiring diagram of a Ford breakerless (Duraspark II-style) ignition system, showing the physical components and how the primary and secondary circuits interconnect. Components illustrated…
• Ford Bronco IAC / Throttle Air Bypass Valve Solenoid Wiring Diagram (C160, S165)
  This document is a cropped portion of a Ford wiring diagram showing the Throttle Air Bypass Valve Solenoid (idle air control) circuit. The diagram shows connector C160 at the top, with power feed circuit 361 (red wire…
• Ford Bronco Idle Air Bypass Valve Wiring Diagram - Circuit 361 IAC Schematic
  This is a close-up crop from a Ford wiring schematic page showing the engine-control circuit for the Idle Air Bypass Valve. Circuit number 361 is shown with the wire color code "R" (red) feeding the Idle Air Bypass…
• Ford Bronco Idle Speed Control Wiring Diagram - ISC Solenoid, Diode & Wire Colors
  This is a cropped fragment of an automotive wiring schematic showing part of an idle speed control circuit. Two parallel circuit branches are shown, both fed from a common RED wire on the left. The upper branch passes…
• 1995 Ford Bronco Instrument Cluster Wiring Diagram 60-2 - Temp & Oil Gauges
  This is page 60-2 of the 1995 Ford Bronco electrical/wiring diagram manual, covering the Instrument Cluster gauge circuits for the coolant temperature gauge and engine oil pressure gauge. The diagram shows the…
• Constant to Momentary 12V Output Relay Wiring Diagram - Capacitor & Resistor
  This document is a small electrical schematic titled "Constant to Momentary 12v(+) Output," sourced from the12volt.com (visible watermark). It shows how to wire a standard 5-pin automotive relay (terminals 30, 85, 86…
• Ford Bronco/F-Series A/C-Heater Electrical Wiring Diagram - Clutch Circuit
  This is a scanned page from a Ford factory-style electrical/vacuum troubleshooting manual (EVTM) showing the A/C-Heater (Electrical) wiring diagram. It covers the A/C clutch circuit fed from fuse panel position 9 (30…
• Ford Bronco/Truck Duraspark Start-Ignition Wiring Diagram 5.8L 7.5L - EVTM p.27
  This is page 27 of a Ford electrical and vacuum troubleshooting manual (EVTM), showing the Start/Ignition wiring diagram for Duraspark ignition on 5.8L and 7.5L engines. It traces power from Fuse Link M (14 GA green…
• Ford EEC-IV 60-Pin ECM Connector Pin Numbering Diagram (Pinout Layout)
  This image is a simple graphical pinout reference for a 60-pin Ford EEC-IV engine computer (ECM/PCM) connector, uploaded to a 1990 Ford Bronco gallery. The drawing shows the connector body face-on with three horizontal…
• DPDT Rocker Switch Wiring Diagram - DC Motor Polarity Reversing Hookup
  This document is a wiring diagram/photograph showing how to wire a 6-terminal double-pole double-throw (DPDT) rocker switch to reverse the polarity of a DC motor. The switch is shown from the rear with its six screw…
• Ford Gray Distributor-Mount TFI Ignition Module Pinout - Push Start Version
  This document is a labeled pinout diagram of the gray distributor-mounted TFI (Thick Film Integrated) ignition control module, specifically the "Push Start" version, as used in Ford vehicles. The drawing shows the…
• Transmission Lockup TCC/OD Case Connector Wiring Diagram - 52 & 44 Switches
  This is a color-coded, hand-drawn wiring diagram showing how to wire a transmission case connector for torque converter clutch (TCC) and overdrive (OD) lockup control. The transmission case connector (shown in yellow)…
• Ford Bronco RABS Module Harness Connector Pin View - Pin #2 Location Diagram
  This document is a simple line drawing showing the pin-out view of a 14-pin module harness connector, uploaded as a reference for the RABS (Rear Anti-lock Brake System) module on a 1990 Ford Bronco. The diagram shows…
• 1995 Ford Bronco 5.0L Fuel Pump Wiring Diagram - Inertia Switch & Sender 24-8
  This is page 24-8 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual, covering the Engine Controls (5.0L) fuel pump circuit. The wiring diagram traces power from connector C202 (continued from page 24-1)…
• 1995 Ford Bronco Radio Wiring Diagram 130-4 - C258 Speaker Connector Pinout
  This document is page 130-4 of the 1995 Ford Bronco factory wiring manual, covering the RADIO section. It shows the pinout for connector C258, the 8-pin radio speaker connector, in two versions: the standard radio…
• 1995 Ford Bronco Radio Wiring Diagram - C257 Connector Pinout (Page 130-3)
  This document is page 130-3 of the 1995 Ford Bronco factory wiring reference, covering the RADIO system. It shows connector face views and a pinout table for connector C257, in two variants: the standard C257 RADIO…
• 1995 Ford Bronco Radio Premium Sound Wiring Diagram 130-2 - Amp & Speakers
  This is page 130-2 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual (EVTM), showing the wiring diagram for the Radio with Premium Sound. It documents power feeds to the radio: circuit 797 (LG/P) from…
• 1995 Ford Bronco Radio Wiring Diagram 130-1 - Speaker & Power Circuits
  This is page 130-1 (RADIO) from the 1995 Ford Bronco factory electrical/vacuum troubleshooting manual (EVTM), showing the base (non-premium) radio wiring schematic. It documents the radio's power feeds: circuit 797…
• Ford MAF Sensor Connector Pinout & Electrical Test Chart - Wire Colors
  This document is a wiring and testing reference for the Ford Mass Air Flow (MAF) sensor connector. It shows two connector diagrams identifying the pin assignments and wire specifications: pin D is MAF SIG (Blue/Orange…
• 1988-93 Ford Mustang Mass Air EEC-IV Wiring Diagram - Sensor & Injector Pinout
  This is a color-coded EEC-IV wiring/pinout schematic for 1988-1993 Mass Air Ford Mustang electronic fuel injection systems. It maps each engine management sensor and actuator connector to its EEC computer pin number…
• 1995 Ford Bronco A/C Heater Wiring Diagram - Clutch Cycling Switch Circuit 54-3
  This is page 54-3 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual, showing the wiring diagram for the Air Conditioner/Heater A/C clutch control circuit. Power originates from fuse 6 (15A) in the fuse…
• 1990 Ford Bronco Manual A/C-Heater Wiring Diagram 54-2 - Blower & AC Clutch
  This document is page 54-2 of a Ford factory wiring diagram set, covering the Manual A/C-Heater system for gasoline-engine vehicles. It shows power originating from fuse 9 (30A, hot in run) in the fuse panel (pages…
• 1995 Ford Bronco 5.0L Engine Controls Wiring Diagram 24-1 - MAF & PCM Power
  This is page 24-1, "Engine Controls (5.0L)," from the 1995 Ford Bronco electrical/vacuum troubleshooting manual (dated 5/12/94), focused on PCM power distribution and the Mass Air Flow (MAF) sensor circuit. It shows…
• 1995 Ford Bronco 5.0L Engine Controls Wiring Diagram (Page 24-1) - PCM & MAF
  This is page 24-1 of the 1995 Ford Bronco Electrical and Vacuum Troubleshooting Manual, covering Engine Controls for the 5.0L engine. Dated 5/12/94, the wiring diagram shows power distribution to the Powertrain Control…
• 1990 Ford Bronco 5.0L/5.8L Start Ignition Wiring Diagram - TFI Module (20-4)
  This document is page 20-4 of a Ford factory electrical/vacuum troubleshooting manual, covering the Start/Ignition circuit for 5.0L and 5.8L engines. It is a wiring diagram showing the TFI (Thick Film Ignition)…
• 1990 Ford Bronco Instrument Cluster Wiring Diagram 60-2 (Gas, No Tachometer)
  This document is page 60-2 of a Ford electrical/vacuum troubleshooting manual, showing the instrument cluster wiring diagram for gas engine vehicles without a tachometer. Power comes from fuse 18 (15A) in the fuse…
• 1990 Ford Bronco Instrument Cluster Wiring Diagram 60-1 - Gas with Tachometer
  This document is page 60-1 of a Ford factory wiring diagram set, showing the Instrument Cluster circuit for gas engines equipped with a tachometer. Power enters the cluster from fuse 18 (15A) in the fuse panel, hot in…
• 1995 Ford Bronco 5.8L (MAP) PCM Connector C185 Pinout - 60-Pin EEC Diagram
  This document is a pinout diagram for connector C185, the gray 60-pin Powertrain Control Module (PCM / EEC) connector on a 1995 Ford Bronco with the 5.8L (MAP-equipped) engine. The connector face is drawn with all 60…
• 1995 Ford Bronco Charging System Wiring Diagram - Alternator & Regulator (12-1)
  This is page 12-1 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual, showing the Charging System wiring diagram. It illustrates the circuit from the battery (grounded at G101 body and G103 engine via BK…
• 1995 Ford Bronco 5.0L Engine Controls Wiring Diagram - PCM & Fuel Pump Relay 24-1
  This document is page 24-1 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual, covering Engine Controls for the 5.0L engine, dated 5/12/94. It shows the power distribution portion of the engine control…
• 1995 Ford Bronco 5.8L California Wiring Diagram 25-11 – MIL & Heated O2 Sensor
  This document is page 25-11 of a Ford factory wiring diagram set covering Engine Controls for the 5.8L (California emissions) engine. It shows the circuits for the Malfunction Indicator Lamp (MIL) in the instrument…
• 1986 Ford Bronco EFI 5.0L Electronic Engine Control Wiring Diagram (Page 60)
  This is page 60 of a Ford electrical/vacuum troubleshooting manual (EVTM) showing the Electronic Engine Control wiring diagram for the EFI 5.0L engine. It traces power from the ignition switch (circuit 20 W/LB via Fuse…
• 1995 Ford Bronco Starting System Wiring Diagram (20-2) - Starter Relay & TR Sensor
  This is page 20-2 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual, showing the second half of the Starting System wiring diagram (continued from page 20-1 at connector C103M). It covers both manual…
• 1995 Ford Bronco Starting System Wiring Diagram (Page 20-1) - Ignition & CPP
  This document is page 20-1 of the 1995 Ford Bronco electrical wiring diagram set, covering the Starting System. It directs readers to section 03–06 of the Service Manual for diagnostic information and to page 149-2 for…
• 1995 Ford Bronco Backup Lamps Wiring Diagram (93-1) - TR Sensor & Switch
  This document is page 93-1 of the 1995 Ford Bronco electrical/wiring diagram manual, covering the Backup Lamps circuit. It shows that power comes from a 15A fuse (position E) in the Engine Compartment Fuse Box, hot in…
• 1995 Ford Bronco E4OD Transmission Wiring Diagram (EVTM Page 30-1)
  This is page 30-1 of the 1995 Ford Bronco Electrical and Vacuum Troubleshooting Manual (EVTM), showing the wiring schematic for the E4OD automatic transmission control circuits. It traces power from the fuse panel…
• 1995 Ford Bronco Anti-Theft Wiring Diagram 112-3 - Door Lock & Tamper Sensor
  This is page 112-3 of the 1995 Ford Bronco factory wiring diagram set (EVTM), covering the Anti-Theft system. The diagram shows the Anti-Theft Controller Module (grid reference 151-3 A4) with its Lock Doors (pin 9)…
• 1995 Ford Bronco Anti-Theft Wiring Diagram 112-2 - Controller Module Circuits
  This is page 112-2 of the 1995 Ford Bronco electrical vacuum troubleshooting manual (EVTM), covering the Anti-Theft system wiring. The schematic shows the Anti-Theft Controller Module (component location reference…
• 1995 Ford Bronco Anti-Theft System Wiring Diagram (Page 112-1)
  This is page 112-1 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual, showing the Anti-Theft system wiring diagram. It covers the Anti-Theft Controller Module (component location 151-3 A4) and its power…
• Ford Black Remote-Mount TFI Ignition Module Wiring Schematic - EEC Pinout
  This document is a wiring schematic for the black remote-mounted TFI (Thick Film Ignition) module used on Ford EEC-IV ignition systems. It shows the 8-pin distributor connector (pins 1–8) and how its circuits route…
• Ford TFI Ignition Module Wiring Schematic - Black Distributor Mounted (EEC-IV)
  This is a wiring schematic for the black distributor-mounted TFI (Thick Film Ignition) ignition module used on Ford EEC-IV fuel-injected vehicles. The diagram shows the six-pin TFI module connector on the left and…
• Ford Gray Remote Mount TFI Ignition Module Wiring Diagram - EEC-IV Schematic
  This document is a wiring schematic for the gray remote-mounted TFI (Thick Film Ignition) ignition module used in Ford EEC-IV ignition systems, published by RJM Injection Technologies (www.fordfuelinjection.com…
• Ford TFI Ignition Module Wiring Schematic - Gray Distributor Mount (EEC Pins)
  This document is a wiring schematic for the gray distributor-mounted TFI (Thick Film Ignition) ignition module used on Ford EEC-controlled vehicles. It shows the six-pin TFI module connector and traces each pin's…
• 1995 Ford Bronco Ignition System Wiring Diagram - TFI, ICM & PCM Schematic
  This document is page 21-1, "Ignition System," from the 1995 Ford Bronco wiring diagram manual. It shows the complete ignition system schematic, including the Powertrain Control Module (PCM), SPOUT check connector…
• Ford 5.0L & 5.8L TFI Start/Ignition Wiring Diagram - EEC Module & Coil (20-4)
  This is a scanned page (20-4, "START/IGNITION") from a Ford factory wiring diagram manual covering the start/ignition circuit for 5.0L and 5.8L engines with the TFI (Thick Film Ignition) system. The diagram shows the…
• 1986-95 Ford V8 Truck Speed Density EEC-IV Wiring Diagram - VSS & Sensor Pins
  This is a wiring/pin-out schematic for the Ford EEC-IV speed density fuel injection system used on 1986-95 V8 trucks, produced by RJM Injection Technologies (fordfuelinjection.com, copyright 2004). It shows connector…
• Ford DuraSpark II Ignition Wiring Diagram - Module, Coil & Resistor Schematic
  This document is a hand-drawn color wiring schematic for a Ford DuraSpark II ignition system. It shows how the DuraSpark module connects to the distributor, TFI coil, ballast resistor, ignition switch, and starter…
• 1990 Ford Bronco Anti-Lock Brakes (RABS) Wiring Diagram - EVTM Page 42-2
  This document is page 42-2 of a Ford factory electrical/vacuum troubleshooting manual (EVTM), showing the wiring schematic for the Anti-Lock Brakes system — specifically the Rear Anti-Lock Brake System (RABS). The…
• 1989-95 Ford MAF Sensor Connector Pinout Diagram - Wire Colors & Pins A-D
  This document is a color-coded connector pinout diagram for the 1989-95 Ford Mass Air Flow (MAF) sensor. It shows an oval 4-pin sensor connector viewed face-on, with pins labeled A, B, C, and D from left to right. Each…
• 1989 Ford Bronco Ignition Switch Bypass Wiring Diagram - Toggle & Push-Button
  This is a hand-drawn wiring diagram, uploaded to the gallery of a 1989 Ford Bronco, showing a simple ignition-switch bypass or replacement scheme using toggle switches and a push-button. On the left, two wires labeled…
• Ford TFI Module Connector Pinout - 4.9L 5.0L 5.8L Wire Colors & Circuits
  This document is a scanned page (page 150-19, titled "Connector Faces/Pins") from a Ford electrical/vacuum reference manual showing the connector face pinout for the TFI (Thick Film Ignition) module used on 4.9L, 5.0L…
• Ford HEGO Heated Oxygen Sensor Connector Pinout Diagram - 1990 Bronco EFI
  This document is a simple connector pinout diagram for a Heated Exhaust Gas Oxygen (HEGO) sensor, uploaded as reference material for a 1990 Ford Bronco. The illustration shows a face view of the round 4-pin HEGO sensor…
• 2008 Kawasaki KLX140 / KLX140L Wiring Diagram - Electrical System Schematic
  This document is a scanned page (15-8 Electrical System, Wiring Diagram) from a Kawasaki service manual, hand-labeled "2008 KLX 140 / KLX 140L." It shows the complete electrical schematic for the KLX140 dirt bike…
• 1995 Ford Bronco TFI Ignition Control Module Connector C1021 Pinout Diagram
  This document is a scanned page (labeled "Ignition System 21-2") from a 1995 Ford Bronco wiring reference. It shows the connector face view and pinout for connector C1021 (gray), which plugs into the Ignition Control…
• 1995 Ford Bronco C103 In-Line Connector Pinout - EVTM Page 150-2
  This is page 150-2, 'In-Line Connector Faces,' from the 1995 Ford Bronco electrical/vacuum troubleshooting manual (EVTM). It shows face-view pinout diagrams for the mating in-line connector pair C103F (female, black…
• 1995 Ford Bronco TR Sensor (MLPS) Testing - E4OD/4R70W Pinout & Ohm Values
  This is page 149-9 of a Ford component testing reference, titled 'Component Testing: Transmission Range (TR) Sensor' for the 1995 Bronco. It covers bench/continuity testing of the TR sensor (also known as the MLPS)…
• 1995 Ford Bronco E4OD Transmission Wiring Diagram - Solenoids, PCM Pins (30-2)
  This is page 30-2 of a 1995 Ford Bronco electrical/vacuum troubleshooting manual showing the complete wiring schematic for the E4OD automatic transmission control circuit. It shows power feeds from the engine…
• 1990 Ford Bronco E4OD Transmission Wiring Schematic - EEC Pins & Wire Colors
  This is a scanned factory wiring schematic page (30-2) for the Ford E4OD electronically controlled automatic transmission on gasoline engines, uploaded as applying to a 1990 Ford Bronco. The diagram shows the circuit…
• 1995 Ford Bronco E4OD Transmission Connector C1048 Pinout & Wire Colors
  This document is page 30-3 of a Ford wiring reference covering the E4OD automatic transmission in the 1995 Ford Bronco. It shows the 12-pin transmission connector, identified as C1048 (gray), with a face-view diagram…
• Ford E4OD Transmission Connector Pinout Diagram - Pin & Wire Color Chart
  This document is a pinout diagram and legend for the E4OD automatic transmission 12-pin harness connector, uploaded to a 1990 Ford Bronco gallery. The top portion shows a drawing of the connector face with pin…
• 1990 Ford Bronco Horn & Cigar Lighter Wiring Diagram 44-1 (With/Without Cruise)
  This is page 44-1, "Horn/Cigar Lighter," from a Ford wiring diagram manual, uploaded as applying to a 1990 Ford Bronco. It shows two side-by-side wiring schematics: one for vehicles WITH speed control and one WITHOUT…
• 1990 Ford Bronco 5.0L Grounds G103 Wiring Diagram - EEC & HEGO Ground Circuit
  This is page 10-8 of a Ford factory wiring diagram set, showing the "GROUNDS (G103)" circuit for the 5.0L engine. The diagram traces the ground path for circuit 89 (orange wire) from three sources: the Electronic…
• Trailer Wiring Color Code Chart - 4, 5, 6 & 7-Way Connector Wire Colors & Gauges
  This document is a trailer wiring color code reference chart covering 4-way, 5-way, 6-way, and 7-way trailer connectors. For each circuit function it lists the standard wire color, the suggested minimum wire gauge…
• 4-Pin Flat Trailer Wiring Diagram - Wire Color Codes & Light Functions
  This document is a wiring schematic for a standard 4-pin (4-way flat) trailer wiring harness, showing a top-down view of a trailer frame with the wire routing and lamp locations. The diagram identifies the function of…
• Ford E4OD Test Harness T89T-70100-A Terminal Locations & Wire Color Codes
  This is a scanned page (17-09-35) from a Ford service manual section titled "Transmission—Automatic E4OD, CONDITION/CAUSE (Continued)." It illustrates the E4OD Test Harness, Ford tool number T89T-70100-A, used for…