5.0l engine electrical relays and wiring help please - Ford Mustang Forum
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post #1 of 6 (permalink) Old 03-12-2007 Thread Starter
highwayinthesky's Avatar
Joined: Sep 2006
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5.0l engine electrical relays and wiring help please

i am coming down to the end of my 5.0l rx7 swap and need to get a bit of help with the wiring. the motor and engine harness are out of a 89gt with a t5 transmission, the eec is an A9L.

firstly, i dont know what relay this is. sorry i cant find the paper that i wrote the wire colours on but i know there is a pink one with a stripe and a orange one with a blueish stripe. my diagrams say it is the wot/ac shut off relay. it is normaly located right by the maf plug and the hego plug. it is the only relay around there.

5.0l engine electrical relays and wiring help please-2463784_46_full.jpg

5.0l engine electrical relays and wiring help please-2463784_47_full.jpg

any ideas? wot/ac or fuel pump relay?

now onto my next question

what the junk is this thing for? it is located right by the eec in the footwell and i dont think that is was connected in my parts car but i am not shure. green 8 pin connector with 7 wires, all i can in my diagrams is that it is a green 8pin connector

5.0l engine electrical relays and wiring help please-2463784_48_full.jpg

5.0l engine electrical relays and wiring help please-2463784_49_full.jpg

and lastly just to set my mind at rest this is the eec power relay right?

5.0l engine electrical relays and wiring help please-2463784_50_full.jpg

thanks to all for reading this and to anyone that can help i wont forget.

i will also continue to post by electrical questions in this thread and hopefully anyone else that has engine electrical questions this will help.
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post #2 of 6 (permalink) Old 03-12-2007
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im not sure what the first relay is at the top, but i know the fuel pump relay is inside the car under the drivers seat. i really dont know what the 8 pin connector is for but that does look like the eec relay, its located right by the computer.
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post #3 of 6 (permalink) Old 03-12-2007 Thread Starter
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the fuel pump relay is inside? i thought that the fuel pump relay was under the hood. i still dont know what the green connector is, does anyone know? and i am positive that the last relay is the eec power relay.

so what is the green connector?
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post #4 of 6 (permalink) Old 06-23-2007
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Joined: Jun 2007
Location: West Sacramento
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You are not going to believe this. I have a relay switch I can't find where it goies. That third pic, where is the in the car? I thinkt aht is it. We have a 1993 2.3l coupe that we love that we have named Sally. She went down a few days agoa nd all the research I have done indicates it is the EEC relay, I bought the part but can't figure out where to plug it in. I think that is the spot in the third picture. Thanks so much!
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post #5 of 6 (permalink) Old 06-23-2007
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there is a fuel relay under the seat and by the computer and on by/ under the maf by the air box

New addition: 1986 GT t-tops 5.0L 5speed, intake, exhaust,9mm plug wires

1987 Mustang LX 5.0 5-speed,white with smoke grey interior,MAF conversion,Perfection clutch(valeo)2.5inch Ravin exhaust, subframe connectors, ported lower intake & heads=SOLD
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post #6 of 6 (permalink) Old 06-24-2007
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The first relay is the WOT/AC reley. the green 8 pin connector is one of the links between the computer harness and the body harness. the wires are for: gray/yellow- o2 heater power, tan/LT Green-ecm pin 22, Red-inertia switch,organe/DK blue-pin 54, black/white-signal return for netural safety switch,red/LT green-pin2, tan-pin 17 to check engine light. Those color codes are for a 88 gt but they should be close.That last relay lookes like your eec power relay. the fuel pump relay is in under the drivers seat, he is green and black. good luck.

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