What does this wiring diagram page cover?

Page 25-7 covers Engine Controls for the 5.8L engine with California emissions, showing the PCM power diode, PCM power relay, fuel pump relay, MAF sensor, EVAP canister purge valve, and Data Link Connector wiring.

What wire color and circuit feeds the inertia fuel shutoff?

Circuit 238 DG/Y (dark green/yellow) runs through connectors C202M/C202F to the inertia fuel shutoff, continued on page 25-12.

What connector is the Mass Air Flow (MAF) sensor on?

The MAF sensor uses connector C130, with circuits including 967 LB/R, 359 GY/R, and 361 R, plus grounding via 57 BK.

What does the fuel pump relay do according to this diagram?

The fuel pump relay directs voltage to the fuel pump; it is fed from a 20A fuse in the engine compartment fuse box (Hot at All Times) and outputs 12V when the relay is energized.

Where are the ground details for this circuit found?

The diagram references grounds G100 and G101 and directs the reader to 'See Grounds' on pages 10-1 and 10-2.

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1995 Ford Bronco 5.8L California Engine Controls Wiring Diagram (Pg 25-7)

Engine Controls 5.8L California wiring diagram page 25-7 with PCM power relay and MAF sensor

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1995 Ford Bronco 5.8L California Engine Controls Wiring Diagram (Pg 25-7)

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Wiring diagram of California 5.8L engine controls showing PCM/fuel pump relays, mass air flow sensor, and EVAP purge circuits.

Part of 1987-1991 Ford Bronco Wiring Diagrams

AI caption February 2011 · Photo 466 of 1787

This document is page 25-7 of a Ford factory wiring diagram set, covering Engine Controls for the 5.8L engine (California emissions). It shows the power distribution and control wiring for the Powertrain Control Module (PCM), including the PCM power diode, PCM power relay, and fuel pump relay, all fed from the engine compartment fuse box via 20A fuses (Hot in Start or Run and Hot at All Times circuits). Major components depicted include the Mass Air Flow (MAF) sensor (connector C130), EVAP canister purge valve (connector C129), Data Link Connector (DLC, C198F), and grounds G100/G101. Circuit numbers and wire colors are labeled throughout, such as 361 R, 57 BK, 570 BK/W, 926 LB/O, 238 DG/Y, 967 LB/R, 359 GY/R, 743 T/LB, and 191 LG/BK. Cross-references direct the reader to Power Distribution (page 13-5), E4OD Transmission (page 30-2), the inertia fuel shutoff (page 25-12), C101 (page 25-8), and Grounds (pages 10-1, 10-2). Explanatory callouts describe how the PCM uses sensor inputs to control fuel flow, EGR, ignition, transmission, and evaporative emissions; how the MAF sensor measures intake air; and how the EVAP canister stores fuel tank vapors.

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Frequently asked questions

What does this wiring diagram page cover?: Page 25-7 covers Engine Controls for the 5.8L engine with California emissions, showing the PCM power diode, PCM power relay, fuel pump relay, MAF sensor, EVAP canister purge valve, and Data Link Connector wiring.
What wire color and circuit feeds the inertia fuel shutoff?: Circuit 238 DG/Y (dark green/yellow) runs through connectors C202M/C202F to the inertia fuel shutoff, continued on page 25-12.
What connector is the Mass Air Flow (MAF) sensor on?: The MAF sensor uses connector C130, with circuits including 967 LB/R, 359 GY/R, and 361 R, plus grounding via 57 BK.
What does the fuel pump relay do according to this diagram?: The fuel pump relay directs voltage to the fuel pump; it is fed from a 20A fuse in the engine compartment fuse box (Hot at All Times) and outputs 12V when the relay is energized.
Where are the ground details for this circuit found?: The diagram references grounds G100 and G101 and directs the reader to 'See Grounds' on pages 10-1 and 10-2.