What circuit powers the MAF sensor on a 1995 Bronco 5.0L?

Circuit 361 (Red), which carries 12V from the PCM Power Relay when the relay is energized, feeds the Mass Air Flow sensor through connector C130.

What are the MAF sensor signal wire colors and circuit numbers?

Circuit 967 LB/R (light blue/red) and circuit 968 T/LB (tan/light blue), going through connector C130 to PCM pins 50 and 9 (with E4OD or 4R70W).

What fuses power the PCM circuit on the 1995 Bronco 5.0L?

Two 20A fuses (positions U and I), hot in start or run; see Power Distribution page 13-5.

Where do the PCM ground circuits go?

Circuit 57 BK goes through splice S102 to ground G100 (grounds page 10-1), and circuit 570 BK/W goes through splice S106 to ground G101 (grounds page 10-2).

What does the PCM Power Relay do in this circuit?

It directs voltage to the PCM, fuel pump relay, and PCM related components; its output on circuit 361 R shows 12V when the relay is energized.

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1995 Ford Bronco 5.0L Engine Controls Wiring Diagram 24-1 - MAF & PCM Power

1995 Ford Bronco 5.0L engine controls wiring diagram 24-1, PCM power relay and MAF, page 2

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1995 Bronco 5.0L engine controls wiring (24-1, second crop) detailing PCM power diode/relay, fuel pump relay, MAF sensor, E40D/4R70W transmission feeds and inertia fuel shutoff.

Part of 1987-1991 Ford Bronco Wiring Diagrams

AI caption September 2012 · Photo 1431 of 1787

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 two 20A fuses (positions U and I, hot in start or run) feeding the PCM Power Diode (circuit 16 R/LG to 175 BK/Y) and the PCM Power Relay (circuit 37 Y). The relay output, circuit 361 R (12V relay energized), branches at splice S136 to the MAF sensor via connector C130, to the E4OD transmission (page 30-2) or 4R70W transmission (page 29-3), and to the Powertrain Control Module (PCM, connector location 151-1 C10). MAF sensor signal wiring is shown as circuits 967 LB/R and 968 T/LB into PCM pins 50 and 9 (with E4OD or 4R70W). Grounds are circuit 57 BK through splice S102 to G100 and circuit 570 BK/W through splice S106 to G101, with references to grounds pages 10-1 and 10-2. A note directs readers to the Powertrain Control/Emissions Diagnosis Manual for diagnostic information, and callouts explain the MAF sensor's role in calculating fuel delivery.

This document covers 1995, which may differ from this 1990 Ford Bronco.

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Frequently asked questions

What circuit powers the MAF sensor on a 1995 Bronco 5.0L?: Circuit 361 (Red), which carries 12V from the PCM Power Relay when the relay is energized, feeds the Mass Air Flow sensor through connector C130.
What are the MAF sensor signal wire colors and circuit numbers?: Circuit 967 LB/R (light blue/red) and circuit 968 T/LB (tan/light blue), going through connector C130 to PCM pins 50 and 9 (with E4OD or 4R70W).
What fuses power the PCM circuit on the 1995 Bronco 5.0L?: Two 20A fuses (positions U and I), hot in start or run; see Power Distribution page 13-5.
Where do the PCM ground circuits go?: Circuit 57 BK goes through splice S102 to ground G100 (grounds page 10-1), and circuit 570 BK/W goes through splice S106 to ground G101 (grounds page 10-2).
What does the PCM Power Relay do in this circuit?: It directs voltage to the PCM, fuel pump relay, and PCM related components; its output on circuit 361 R shows 12V when the relay is energized.