Okay Guys,
We were asked today how to wire ISIS to a Ford OBDI EEC module. This customer in particular did one of the first 4.6L transplants into a Mustang. The donor car was a 1991 Lincoln Town Car.
We'll get some prettier drawings of this, but here is how you would wire the outputs on the ISIS POWERCELL to the harness of the Ford EEC module.
These two wires are hot all the time.
Yellow/Black wire connects directly to B+ through a 30-amp fuse.
Pink/Black wire connects directly to B+ through a 20-amp fuse.
The Dark-Blue/Orange wire needs to get voltage when the starter is cranking. Splice this wire into the starter output off of the POWERCELL.
If you are using the EEC Power Relay with the EEC Power Diode, connect the Red/Light-Green wire to the Ignition output on the POWERCELL. If you are not using the EEC Power relay, you can connect the red-wire from splice S129 to the Ignition output on the POWERCELL.
The Green-Yellow/Yellow is the connection for the HEGO sensors. You can either use a separate output off of a POWERCELL to power this or you can use the ignition output to switch a relay to provide power to this.
You can find similar ECU wiring schematics for ISIS plus other tips and tricks at our Reference Library at www.isispower.com.
Jay
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