Circuit Opening Relay Wiring: Difference between revisions
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Revision as of 13:03, 27 June 2007
Circuit Opening Relay
A circuit opening relay can be used to run a electronic fuel pump in an EFI car. The circuit opening relay provides power to the fuel pump while cranking and keeps running when the engine starts up (Provided your ECU has a place you can wire it to). I have used a circuit opening relay in my AE86 4AGE wired to the "FC" pin on the ECU.
Wiring Diagram:
Black - Wires to to STA - Starter/ECU Start Signal.
White/Red - Wires to EFI Relay - +12v Ignition Switched power.
Green - Wires to engine run signal - "FC" pin on 4AGE ECU.
White/Black - Wires to body earth - Wire to closest earth point.
Blue/Black - Wire to fuel pump positive - Gives power to your fuel pump.
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