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FORD BRONCO -> ELECTRICAL; EEC/PCM, Self-Test, wiring diagrams... -> Electronic Engine Control (EEC); SELF TEST & Diagnostic Trouble Code (DTC), OBD II, etc. -> EEC-III
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EEC III EFI Pin-Outs
Source: by Tommy at home.comcast.net
EEC III EFI Wiring Diagram
Source: by Tommy at home.comcast.net
EEC III Feedback Carburetor System Diagram
Source: by Tommy at home.comcast.net
EEC III Feedback Carburetor Wiring Diagram
Source: by Tommy at home.comcast.net
EEC III Testing, Pin-Out, Wiring & Vacuum Diagrams in an 82; "...Woe was me, when I found out my 82 Ford Bronco was an EEC 3..."
Source: by Tommy at home.comcast.net/~TommySpace/EEC3.html
EFI System Schematic
Source: by Tommy at home.comcast.net
Overview; "...There were two different EEC-III modules; Feedback Carburetor (FBC) and Central Fuel Injection (CFI - similar to GM Throttle Body Injection). The module size and shape were approximately the same as the EEC-II and still utilized the external memory module. The two module had differently keyed connector to prevent accidental insertion in the wrong vehicle. The FBC module controlled the same Ford 7200 VV Carburetor as the EEC-II. The CFI module fired 2 high pressure (approximately 40 psi) injectors that were mount in a throttle body mounted to a traditional intake manifold in the center valley of the 5.0L (302 cid) engine. CFI was available on all Ford vehicles with the 5.0. The processor was designed and manufactured by Motorola. It featured 8 bit data length, 10 bit instruction length and a 13 bit address length. The address space was "paged", meaning you could not directly address all of the address space without special instructions. There were 4 pages. Page 0 was for normal (background) code, page 1 was for interrupt code, page 2 was also for background, but could only be accessed by a special "Jump Page" instruction from page 0. Page 3 was used to store parameteric ("calibration") data or additional interrupt level code. This chip was never sold commercially. Like EEC-I and II, all code was written in assembly language.While all processor chips were manufactured by Motorola, the modules were designed and assembled by either Motorola, Toshiba or Ford. The designs were "functionally equivalent" but slightly different components were used. Motorola optimized their design to use as many of their own components as possible..."
Source: by wikipedia.org
SELF TEST - & DTCs; EEC III; "...The EEC-III is one of the engine control computer systems used by Ford since midyear 1978. (We will cover the others in later issues.) This procedure uses an inexpensive voltmeter and other generally available test devices instead of the special diagnostic tester originally specified by Ford. Just follow these steps to get the service codes from cars using this system..."
Source: by tomco-inc.com
Symbols in Wiring Diagrams
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Vacuum Line Routing Diagram in a EEC III EFI
Source: by Tommy at home.comcast.net