1986 Ford Mustang 2.3L Turbo EEC Wiring Diagram - Fuel Pump Relay & ECA Circuits

This is page 112 of a Ford factory wiring diagram book covering the Electronic Engine Control (EEC) system for the 4-cylinder Turbo engine, from a 1986 Ford Mustang manual (per the file set). The schematic shows the EEC power distribution: a HOT IN START OR RUN feed from the ignition switch (circuit 16 R/LG, page 99) and HOT AT ALL TIMES feeds through Fuse Link W (20 GA blue) and Fuse Link Q (18 GA blue) from page 10. It details the EEC Power Relay, circuit 361 (R) power distribution to the Electronic Control Assembly (ECA) pins 1, 37, and 57, the Inertia Switch (opens on impact) feeding circuit 366 R/BK to the Fuel Pump Relay, and circuit 787 PK/BK to the electric Fuel Pump. Ground circuits 57 and 60 (BK) run to grounds G101, G122, and G301, with a Vacuum Bypass Switch and a .68 ohm resist wire in the fuel pump ground path via splices S195/S196. Connectors C274, C149, C319, and the EEC Test connector (C1984, circuit 97 T/LG) are shown, plus cross-references to fog lamps/fuel selection (page 139) and grounds (page 27). Readers can trace wire colors, circuit numbers, splices, and connector locations for diagnosing EEC power and fuel pump circuits.