What PCM pins control the fuel injectors on the 5.8L under 8500 GVW?

Per the diagram: injector #1 pin 75 (555), #2 pin 95 (556 W), #3 pin 74 (557 BR/Y), #4 pin 94 (558 BR/LB), #5 pin 73 (559 T/BK), #6 pin 100 (560 LG/O, E4OD only notation), #7 pin 72 (561 T/R), #8 pin 98 (562 LB).

What powers the fuel injectors and IAC valve?

All are fed by circuit 361 (red), marked *12V RELAY ENERGIZED, coming from splice S136 on page 25-1 through connectors C101M/C101F and splices S149/S151.

How does the Idle Air Control (IAC) valve work according to this diagram?

The callout states it controls idle speed during all modes of engine operation; duty cycles sent by the PCM control a solenoid that opens or closes an air bypass depending on the signal received. Its PCM wire is 264 W/LB via connectors C101F/C101M.

What wire connects the Data Link Connector (DLC) to the PCM?

Circuit 107, purple (P), from DLC pin 13 through connectors C227F and C202F/C202M to PCM pin 13.

Where are the transmission control circuits continued?

The E4OD transmission control wires (925 W/Y, 237 O/Y, 923 BR/O, 911 P/Y, 315, 924 O/V, 480 O/BK, 224 W/LG) continue on pages 30-1 and 30-2; the vehicle speed sensor is on page 64-1 and all-wheel drive on pages 34-1, 34-3.

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1996 Ford Bronco 5.8L Engine Controls Wiring Diagram - Fuel Injectors, IAC, PCM

96 Bronco 25-2 Engine Controls 5.8L under 8500 GVW wiring diagram: idle air control valve, fuel injectors, vehicle speed sensor, PCM

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Engine controls wiring diagram for 1996 Ford Bronco 5.8L showing idle air control valve and fuel injector circuits.

AI caption July 2017 · Photo 252 of 386

This is page 96 of a factory-style wiring diagram set, section "25-2 Engine Controls, 5.8L Under 8500 GVW." It shows the engine-control wiring for a 5.8L engine, centering on the Powertrain Control Module (PCM, solid state). The diagram traces the 12V relay-energized feed (circuit 361, red) from splice S136 (page 25-1) through connectors C101M/C101F and splices S149/S151 to the Idle Air Control (IAC) valve and all eight fuel injectors (connectors C190–C197), with each injector's PCM control wire identified by circuit number, color, and PCM pin (e.g., 555 T pin 75, 556 W pin 95, 557 BR/Y pin 74, 558 BR/LB pin 94, 559 T/BK pin 73, 560 LG/O pin 100, 561 T/R pin 72, 562 LB pin 98). Explanatory callouts describe the IAC valve (PCM duty-cycles a solenoid to bypass air) and fuel injectors (PCM-controlled, mounted at each intake port). Also shown: the Data Link Connector (DLC) wire 107 P to PCM pin 13, air conditioner/heater input 198 DG/O, all-wheel drive output 784 LB/BK (pages 34-1/34-3), vehicle speed sensor wires 676 P/O and 679 GY/BK (page 64-1), and E4OD transmission control circuits (pages 30-1, 30-2). Readers can use it to trace circuits, wire colors, connector IDs, and PCM pin numbers for diagnostics.

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Frequently asked questions

What PCM pins control the fuel injectors on the 5.8L under 8500 GVW?: Per the diagram: injector #1 pin 75 (555), #2 pin 95 (556 W), #3 pin 74 (557 BR/Y), #4 pin 94 (558 BR/LB), #5 pin 73 (559 T/BK), #6 pin 100 (560 LG/O, E4OD only notation), #7 pin 72 (561 T/R), #8 pin 98 (562 LB).
What powers the fuel injectors and IAC valve?: All are fed by circuit 361 (red), marked *12V RELAY ENERGIZED, coming from splice S136 on page 25-1 through connectors C101M/C101F and splices S149/S151.
How does the Idle Air Control (IAC) valve work according to this diagram?: The callout states it controls idle speed during all modes of engine operation; duty cycles sent by the PCM control a solenoid that opens or closes an air bypass depending on the signal received. Its PCM wire is 264 W/LB via connectors C101F/C101M.
What wire connects the Data Link Connector (DLC) to the PCM?: Circuit 107, purple (P), from DLC pin 13 through connectors C227F and C202F/C202M to PCM pin 13.
Where are the transmission control circuits continued?: The E4OD transmission control wires (925 W/Y, 237 O/Y, 923 BR/O, 911 P/Y, 315, 924 O/V, 480 O/BK, 224 W/LG) continue on pages 30-1 and 30-2; the vehicle speed sensor is on page 64-1 and all-wheel drive on pages 34-1, 34-3.