More EFI problems

blue66tang

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Jan 20, 2001

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Medford, OR

Oct 14, 2006

#1

• Oct 14, 2006

• #1

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I have more efi problems. I have all kinds of wiring diagrams for my 89 HO that i am putting into my 84 cj7. The problem is that a ton of wires are not matching up to my harness. I know i have a mass air harness yet all the mass air harness diagrams are not matching my harnes. Are some of the harneses different? My main engine harness has 2 8 pin connectors one is grey and one is black. These are not the 10 pin harnesses. All the diagrams i have says there should be only one brown harness. Does anybody know what harnnes i have so i can find the right diagrams. Im as frustraited as heck now.
Thanks

 

jrichker

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Oct 14, 2006

#2

• Oct 14, 2006

• #2

Try posting the wire colors. I do have a full 89 wiring diagram set that I would be glad to email you if I haven't already done so. I would need your email address since it is too big (2.5 Mb) to pass through Stagnet's email gateway.

Diagrams courtsey of FordFuelInjection.com

The following diagrams may not be the perfect match for yours, but they are typical of The EFI 5.0 Mustangs.
Diagram courtesy of Tmoss & Stang&2birds



See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/

http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

 

blue66tang

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Jan 20, 2001

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Medford, OR

Oct 14, 2006

#3

• Oct 14, 2006

• #3

Thoes are the wire diagrams i have, i bought the helms 89 mustang book. I dont have that brown connector. In place of that brown one I have one black one and one greay one. Both are eight pin. So none of my wires match up to the wires that are in the diagrams. Im thinking that i have an early mass air harnnes. Like an 87-88 harness or something.

 

jrichker

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Oct 14, 2006

#4

• Oct 14, 2006

• #4

Check out the AutoZone wiring diagrams. They may be able to shed some light on your problem.

AutoZone wiring diagrams

http://www.autozone.com/servlet/UiB..._us/0900823d/80/16/71/3c/0900823d8016713c.jsp for 79-88 model Mustangs

http://www.autozone.com/servlet/UiB..._us/0900823d/80/19/59/5a/0900823d8019595a.jsp for 89-93 model Mustangs

http://www.autozone.com/servlet/UiB..._us/0900823d/80/1d/db/3c/0900823d801ddb3c.jsp for 94-98 model Mustangs

 

vristang

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Mar 31, 2005

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Oct 15, 2006

#5

• Oct 15, 2006

• #5

If the 89 diagrams don't match what you have then open your search to a year before and a year after.

My 90GT has a 91 wiring harness.
Only a couple of color changes and pin locations were different, so far as I could tell.

Boy was I confused though.



Good Luck



jason

 

tbovee

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Oct 15, 2006

#6

• Oct 15, 2006

• #6

could it be a 90 harness? Isn't the air bag connector grey?

 

M

MatthewP

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Oct 15, 2006

#7

• Oct 15, 2006

• #7

If you are talking about the two connectors that are on the driver's side near the firewall on the Mustang and connect the engine harness to the chassis harness, that sounds like a 1990 harness to me. The later harnesses use a single (brown) connector at that location.

This seems especially likely if your 89 Mustang was a late build date.

Good luck.

-Matthew

 

blue66tang

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Oct 16, 2006

#8

• Oct 16, 2006

• #8

MatthewP said:

If you are talking about the two connectors that are on the driver's side near the firewall on the Mustang and connect the engine harness to the chassis harness, that sounds like a 1990 harness to me. The later harnesses use a single (brown) connector at that location.

This seems especially likely if your 89 Mustang was a late build date.

Good luck.

-Matthew

Click to expand...

That sounds right. Mine must be a 90. I think i have it all figured out now. Dang was it confuseing for a while. Seems pretty simple now. Only about 6 wires to hook up: fuel pump relay, water temp sending unit, oil pressure sending unit, and about 4 power wires. Does this sound right?