What vehicle and engine does this wiring diagram cover?

The caption states it is for the 1987-88 Ford F-Series Pick-up with the 4.9L (VIN Y) engine.

What wire colors go to the throttle position sensor?

The TPS is fed by ORG/WHT, with DK GRN/LT GRN to ECM pin 47 and a BLK/WHT return/ground wire.

How are the fuel pumps wired on dual-tank trucks?

A tank select switch (FRONT/REAR) feeds the two fuel pumps via RED and BRN/WHT wires; a jumper is used with one-tank models. The pumps have ORG wires and a BLK ground, connecting to ECM area pins 1 and 31 via GRY/YEL.

Is there a wiring difference between 1987 and 1988 models?

Yes, the diagram shows the DK GRN/YEL ignition circuit routed differently for 1988 versus 1987, indicated by bracketed year labels near the ignition coil.

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

1987-88 Ford F-Series 4.9L (VIN Y) engine wiring schematic, EEC electronic engine control module

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Engine wiring diagram for 1987-88 Ford F-Series pickup 4.9L (VIN Y), showing the EEC electronic engine control module and sensor circuits (MAP, TPS, EGR, ECT, knock, O2).

AI caption February 2018 · Photo 145 of 645

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.

This document covers 1987-1988, which may differ from this 1994 Ford Bronco.

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Frequently asked questions

What vehicle and engine does this wiring diagram cover?: The caption states it is for the 1987-88 Ford F-Series Pick-up with the 4.9L (VIN Y) engine.
What sensors connect to the Electronic Engine Control Module in this diagram?: The diagram shows the heated exhaust gas oxygen sensor, EGR valve position sensor, manifold absolute pressure sensor, throttle position sensor, vehicle speed sensor, air charge temperature sensor, engine coolant temperature sensor, and knock sensor, each with wire colors and ECM pin numbers.
What wire colors go to the throttle position sensor?: The TPS is fed by ORG/WHT, with DK GRN/LT GRN to ECM pin 47 and a BLK/WHT return/ground wire.
How are the fuel pumps wired on dual-tank trucks?: A tank select switch (FRONT/REAR) feeds the two fuel pumps via RED and BRN/WHT wires; a jumper is used with one-tank models. The pumps have ORG wires and a BLK ground, connecting to ECM area pins 1 and 31 via GRY/YEL.
Is there a wiring difference between 1987 and 1988 models?: Yes, the diagram shows the DK GRN/YEL ignition circuit routed differently for 1988 versus 1987, indicated by bracketed year labels near the ignition coil.