Does anyone have an image of the wiring diagram for the EEC relay for an 89 F-series truck? The constant hot yellow wire isn't getting 12v so I'm chasing it backwards to the starter solenoid.. For a step-by-step guide to testing the wiring between the EEC Power Relay and PCM (written for the F-Series but mostly the same for other models), check out this tutorial:

Q&A Ford Ranger 89 ICM, ECU, and Timing Issues Explained
Q&A Ford Ranger 89 ICM, ECU, and Timing Issues Explained
1984 mustang installing 5.0 with efi and 87 Ford
1984 mustang installing 5.0 with efi and 87 Ford
Where is eec ecm relay on 91 aerostar Fixya
Where is eec ecm relay on 91 aerostar Fixya
Ford Eec Relay 1990 Mustang Relay Wiring Diagram Wiring Diagram
Ford Eec Relay 1990 Mustang Relay Wiring Diagram Wiring Diagram
86 F150 EEC/Power Relay Ford Truck Enthusiasts Forums
86 F150 EEC/Power Relay Ford Truck Enthusiasts Forums
Ford E350 RV Q&A on EEC Relay JustAnswer
Ford E350 RV Q&A on EEC Relay JustAnswer
Eec Power Relay Wiring Diagram Circuit Diagram
Eec Power Relay Wiring Diagram Circuit Diagram
EEC Power Relay? Have a No Crank Situation with Also
EEC Power Relay? Have a No Crank Situation with Also
Ford Eec Relay 1990 Mustang Relay Wiring Diagram Wiring Diagram
Ford Eec Relay 1990 Mustang Relay Wiring Diagram Wiring Diagram
SOLVED Where is the EEC relay in a 1992 F250
SOLVED Where is the EEC relay in a 1992 F250
Eec Power Relay Wiring Diagram Circuit Diagram
Eec Power Relay Wiring Diagram Circuit Diagram
Ford Eec Iv Schematic
Ford Eec Iv Schematic
Eec Iv Tuning bopqecap
Eec Iv Tuning bopqecap
2001 P71 Eec Wiring Diagram
2001 P71 Eec Wiring Diagram
Eec Iv Wiring Diagram Wiring Diagram Pictures
Eec Iv Wiring Diagram Wiring Diagram Pictures
EEC relay wire
EEC relay wire
Adding fuel pump relay to 91 harness test Ford Mustang
Adding fuel pump relay to 91 harness test Ford Mustang
SOLVED I need to locate the EEC relay on my
SOLVED I need to locate the EEC relay on my
1990 Mustang GT, EEC relay help please Ford Mustang Forum
1990 Mustang GT, EEC relay help please Ford Mustang Forum
Basic Relay Connections Electrical wiring diagram, Electrical wiring
Basic Relay Connections Electrical wiring diagram, Electrical wiring
Electronic Engine Control (EEC)
Electronic Engine Control (EEC)
1988 Ford F150 EEC Wiring Diagrams Yahoo Image Search Results
1988 Ford F150 EEC Wiring Diagrams Yahoo Image Search Results
Eec Power Relay Wiring Diagram Circuit Diagram
Eec Power Relay Wiring Diagram Circuit Diagram
1988 Ford F150 EEC Wiring Diagrams Ford f150, Electrical diagram,
1988 Ford F150 EEC Wiring Diagrams Ford f150, Electrical diagram,
88 91 5 0 EEC Wiring Diagram — Postimages
88 91 5 0 EEC Wiring Diagram — Postimages
Ford Eec Iv Schematic
Ford Eec Iv Schematic
Fan Control / EFIDynoTuning
Fan Control / EFIDynoTuning
EEC Power Relay? Have a No Crank Situation with Also
EEC Power Relay? Have a No Crank Situation with Also
Ford Eec Relay 1990 Mustang Relay Wiring Diagram Wiring Diagram
Ford Eec Relay 1990 Mustang Relay Wiring Diagram Wiring Diagram
Eec Power Relay Wiring Diagram
Eec Power Relay Wiring Diagram

WHERE TO BUY THE EEC POWER RELAY: If you're looking to replace the EEC Power Relay, these are two options I stand by —based on my hands-on experience with these known automotive brands in the shop. Buying through these links helps fund more free tutorials and wiring diagrams —at no added cost to you. Thanks so much for your support!. Section 28 of Ford's 1984 EEC-III Tester Manual covering the 5.0L engines with central fuel injection (CFI). Schematics, connector pin-outs, and test procedures for Ford's EEC-IV systems. Connect the scan tool to the self-test connectors. Make certain the test button is unlatched or up.

Relted Article