What wire color and circuit powers the fuel injectors on the 5.8L California Bronco?

Circuit 361, a red (R) wire that is 12V when the relay is energized, feeds all eight fuel injectors as well as the AIRD solenoid and IAC valve. It comes from splice S136 (page 25-7) through connector C101M/C101F and splice S149.

Which PCM pins control each fuel injector?

Injector #1: pin 58 (555 T); #2: pin 59 (556 W); #3: pin 33 (557 BR/V); #4: pin 45 (558 BR/LB); #5: pin 15 (559 T/BK); #6: pin 12 (560 LG/O); #7: pin 32 (561 T/R); #8: pin 14 (562 LB).

What does the Idle Air Control (IAC) valve do according to this diagram?

It controls idle speed during all modes of engine operation. Duty cycles are sent by the PCM, which controls a solenoid that opens or closes an air bypass depending on the signal received. Its connector is C1007 and its control wire is 264 W/LB to PCM pin 21.

What connector and wire does the Secondary Air Injection Diverter (AIRD) solenoid use?

The AIRD solenoid uses connector C1023 and is controlled by wire 200 BR to PCM pin 34. It directs secondary air to the exhaust manifold or catalytic converter.

Where do the E4OD transmission wiring details continue?

The PCM outputs to the E4OD transmission continue on pages 30-1 and 30-2; the Vehicle Speed Sensor is on page 64-1 and all-wheel drive on page 34-1.

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1995 Ford Bronco 5.8L California Engine Controls Wiring Diagram - Page 25-8

Engine Controls 5.8L California wiring diagram page 25-8 with fuel injectors and IAC valve

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Wiring diagram of California 5.8L engine controls showing fuel injectors, idle air control valve, and secondary air injection solenoid.

Part of 1987-1991 Ford Bronco Wiring Diagrams

AI caption February 2011 · Photo 467 of 1787

This page is sheet 25-8 of a Ford Bronco factory wiring diagram set, covering the Engine Controls circuit for the 5.8L (California emissions) engine. It shows the switched 12V power feed (circuit 361, red wire, relay-energized) coming from splice S136 on page 25-7, passing through connector C101M/C101F and splice S149, and continuing to C180 on page 25-9. This feed powers the Secondary Air Injection Diverter (AIRD) Solenoid (connector C1023), the Idle Air Control (IAC) Valve (connector C1007), and all eight fuel injectors (connectors C190 through C197). Each injector's ground-side control wire is listed with its circuit number and color (555 T, 556 W, 557 BR/V, 558 BR/LB, 559 T/BK, 560 LG/O, 561 T/R, 562 LB) and its corresponding Powertrain Control Module (PCM) pin (58, 59, 33, 45, 15, 12, 32, 14). Callout notes explain the function of the AIRD solenoid, the IAC valve, and the fuel injectors. The bottom of the diagram shows PCM outputs to the all-wheel drive circuit (page 34-1), the Vehicle Speed Sensor (page 64-1), and the E4OD transmission (pages 30-1, 30-2), with wire numbers and colors for each. Useful for diagnosing injector, IAC, and AIRD circuit faults.

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Frequently asked questions

What wire color and circuit powers the fuel injectors on the 5.8L California Bronco?: Circuit 361, a red (R) wire that is 12V when the relay is energized, feeds all eight fuel injectors as well as the AIRD solenoid and IAC valve. It comes from splice S136 (page 25-7) through connector C101M/C101F and splice S149.
Which PCM pins control each fuel injector?: Injector #1: pin 58 (555 T); #2: pin 59 (556 W); #3: pin 33 (557 BR/V); #4: pin 45 (558 BR/LB); #5: pin 15 (559 T/BK); #6: pin 12 (560 LG/O); #7: pin 32 (561 T/R); #8: pin 14 (562 LB).
What does the Idle Air Control (IAC) valve do according to this diagram?: It controls idle speed during all modes of engine operation. Duty cycles are sent by the PCM, which controls a solenoid that opens or closes an air bypass depending on the signal received. Its connector is C1007 and its control wire is 264 W/LB to PCM pin 21.
What connector and wire does the Secondary Air Injection Diverter (AIRD) solenoid use?: The AIRD solenoid uses connector C1023 and is controlled by wire 200 BR to PCM pin 34. It directs secondary air to the exhaust manifold or catalytic converter.
Where do the E4OD transmission wiring details continue?: The PCM outputs to the E4OD transmission continue on pages 30-1 and 30-2; the Vehicle Speed Sensor is on page 64-1 and all-wheel drive on page 34-1.