What wire color is the reference signal to the ECT, IAT, TP and EVP sensors on the 5.8L?

Circuit 359 GY/R (gray/red) is shown feeding the sensors across the top of the diagram, splicing at S161.

What PCM pin does the Throttle Position (TP) sensor signal go to?

The TP sensor signal, circuit 355 GY/W, goes to PCM pin 47 through connectors C1024F/C1024M.

How does the diagram describe the Throttle Position sensor?

As a potentiometer with a DC output that varies with throttle plate angle; the PCM monitors TP sensor output to calculate fuel delivery requirements based on driver demand.

What does the EGR Control Solenoid do?

Per the callout, it regulates the amount of vacuum applied to the EGR valve. Its control wire is 360 BR/PK to PCM pin 33, with 12V present when the relay is energized.

What is the brake pedal input to the PCM with the E4OD transmission?

Circuit 511 LG carries 12V (brake pedal depressed) to PCM pin 2, tied to the Turn/Stop/Hazard Lamps circuit on page 90-2.

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1995 Ford Bronco 5.8L Engine Controls Wiring Diagram - ECT IAT TP EVP Sensors

Engine Controls 5.8L wiring diagram page 25-3 with ECT, IAT, TP and EGR sensor circuits

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Wiring diagram of 5.8L sensor circuits including engine coolant temp, intake air temp, throttle position, and EGR valve position.

AI caption February 2011 · Photo 465 of 1799

This document is page 25-3 of a Ford factory wiring diagram set covering Engine Controls for the 5.8L engine (part of a 1995 Bronco manual set). It shows the sensor circuits feeding the Powertrain Control Module (PCM), including the EGR Control Solenoid, Engine Coolant Temperature (ECT) Sensor, Intake Air Temperature (IAT) Sensor, Throttle Position (TP) Sensor, and EGR Valve Position (EVP) Sensor. Explanatory callouts describe each component's function: the IAT and ECT are thermistors whose resistance decreases with temperature, the TP sensor is a potentiometer with a DC output varying with throttle plate angle, and the EVP provides a voltage signal proportional to EGR position. Wire circuit numbers and color codes are labeled, including 361 R, 359 GY/R (sensor reference), 360 BR/PK, 354 LG/R, 743 GY, 355 GY/W, 351 BR/W, 352 BR/LG, 511 LG, and 310 V/R (not used). Connector identifiers include C180, C182, C183, C164, C1024M/C1024F, C101F/C101M, and C185, plus splices S161 and S135. PCM pin numbers (2, 33, 23, 7, 25, 47, 27, 4, 16, 26, 56) are shown, along with cross-references to page 25-2 (S149), page 90-2 (Turn/Stop/Hazard Lamps), and page 21-1 (Ignition System). An E4OD transmission brake-pedal input (12V, circuit 511 LG) is also shown.

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Frequently asked questions

What wire color is the reference signal to the ECT, IAT, TP and EVP sensors on the 5.8L?: Circuit 359 GY/R (gray/red) is shown feeding the sensors across the top of the diagram, splicing at S161.
What PCM pin does the Throttle Position (TP) sensor signal go to?: The TP sensor signal, circuit 355 GY/W, goes to PCM pin 47 through connectors C1024F/C1024M.
How does the diagram describe the Throttle Position sensor?: As a potentiometer with a DC output that varies with throttle plate angle; the PCM monitors TP sensor output to calculate fuel delivery requirements based on driver demand.
What does the EGR Control Solenoid do?: Per the callout, it regulates the amount of vacuum applied to the EGR valve. Its control wire is 360 BR/PK to PCM pin 33, with 12V present when the relay is energized.
What is the brake pedal input to the PCM with the E4OD transmission?: Circuit 511 LG carries 12V (brake pedal depressed) to PCM pin 2, tied to the Turn/Stop/Hazard Lamps circuit on page 90-2.