1987-88 Ford F-Series 4.9L (VIN Y) Engine Wiring Diagram - EEC Module Pinout

This document is a scanned engine wiring diagram page for the 1987-88 Ford F-Series Pick-up with the 4.9L (VIN Y) inline-six engine. It centers on the Electronic Engine Control Module (EEC/ECM), showing numbered connector pins (e.g., 57, 37, 4, 36, 56, 16, 22, 8, 51, 11, 1, 31, 33, 21, 59, 58 across the top; 49, 29, 17, 24, 10, 43, 46, 27, 45, 26, 20, 47, 60, 40, 25, 3, 6, 7, 30, 23, 48 across the bottom) with wire color codes for each circuit. Components wired to the module include the ignition coil, EEC distributor TFI module, spark plugs, ignition suppression resistor, VIP self-test connector, thermactor air bypass and diverter solenoids, EGR vacuum regulator solenoid, inertia fuel shut-off switch, tank select switch and dual fuel pumps, heated exhaust gas oxygen sensor, power steering pressure switch, EGR valve position sensor, MAP sensor, throttle position sensor, vehicle speed sensor, air charge temperature sensor, engine coolant temperature sensor, and knock sensor. Wire colors such as DK GRN/YEL, RED/LT BLU, PNK/LT GRN, ORG/WHT, and BLK/WHT are labeled throughout, with notes distinguishing 1987 vs 1988 ignition wiring and connections to the starter relay, A/C system, warning indicators, and starting/charging system.