Ford ECT Engine Coolant Temperature Sensor Connector Pinout Diagram

This document is a simple pinout/connector diagram for a Ford Engine Coolant Temperature (ECT) sensor. It shows a face-on illustration of the two-pin sensor connector, with leader lines identifying the two terminals: one labeled "ECT" (the engine coolant temperature signal pin) and the other labeled "SIG RTN" (signal return, the sensor ground). The caption beneath the illustration reads "Engine Coolant Temperature Sensor." The drawing depicts the hexagonal sensor body with its round two-cavity connector in the center. A reader can learn which of the two pins on the ECT sensor carries the temperature signal to the engine computer and which pin is the signal return, which is useful when testing the sensor with a multimeter, diagnosing wiring problems, or verifying harness connections. The document contains no year, model, part number, wire color, resistance specification, or torque information — it is strictly a two-terminal identification diagram. It was uploaded to a 1990 Ford Bronco gallery alongside other EEC-IV related diagrams, and nothing in the image contradicts that application.