Mating a 1994 Mustang 5.0L to a 1988 2.3L body harness, HELP!

Nick94657

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Jan 26, 2017
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So I had a wrecked 1994 that I pulled 99% of all usable parts off of, and a 1988 I had bought a while back. I'm hooking up a 1994 engine harness to the body, but I'm stuck on a few connectors and at this point I'm thinking I'll have to cut/wire/repin parts of the harness. The problem is, I can't seem to find a good wiring diagram on either one without buying some shop manuals. I'm willing to do so if necessary, but I was hoping maybe someone here had some good info.

Another bad thing about this project is I've not touched it for a few years so I've forgotten a lot of what goes where. I have a 1995 sitting beside it that is dead and I'm looking at it to find proper wiring location so most of the motor is hooked up except for the starter to body/ignition switch, the gauges in the dash, and etc.

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This is an engine side (1994) connector. P/N# F2TB-14A459-A. I'm not sure how I'll get this connector working since it has a gasket that is supposed to sandwich up on the inner fender well. I'm thinking I may have to repin/rewire this connector. I can't find the sister connector on the 94 dash wiring I have. It is a 24 pin connector.

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This is an engine side (1994) connector. I'm unsure what this goes to although it looks like it runs into the dash as well. This is right beside the 24 pin connector.

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This is an engine side (1994) connector. I know where these go, in the passenger side inner fender well. But I don't have a name for them and I think I didn't pull those parts off the donor. What are these called?

More to come in the next post...
 
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Nick94657

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Jan 26, 2017
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These are the engine side (1994) connectors. These are the interior connectors on the passenger side. I know what the big connector goes to obviously, but what are the other 3 for?

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These are the body side (1988) connectors. These are all the wires that are going out in the grommet to the engine bay on the driver side. I think the thick yellow ones go up to where a starter solenoid would be, but since this is a 1994 then I'm not quite sure the best route to hook them up to the engine harness. Part of the engine's harness goes to the starter, but again I don't have a wiring diagram and I'm not keen on cutting all the looms open just yet.
 

Dan02gt

10 Year Member
Mar 2, 2003
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The foxbody harnesses were way different from the SN95. I'm sure what you are trying to do could be done, but I think you would be better off finding the proper fox harnesses and a fox A9L computer. They just made to many changes to make it a simple job.
 

Nick94657

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Jan 26, 2017
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The foxbody harnesses were way different from the SN95. I'm sure what you are trying to do could be done, but I think you would be better off finding the proper fox harnesses and a fox A9L computer. They just made to many changes to make it a simple job.
That's what I've been looking into the last week. I'm thinking an 89 harness would work, right?
 

90sickfox

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Mar 2, 2015
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If you get an 88 or 89 v8 harness it will plug and play to the 88 dash harness. You may want to change the computer also....to a megasquirt or other stand alone....or an a9l or a9m ecu. The reason I say a standalone is to keep you from buying a 30 year old busted computer from someone. These factory computers have started revealing every short coming they have. Leaking capacitors, burned ground traces, and cracking solder points.

Don't really know if a 94- 95 computer will work with an 88 or 89 harness.
 
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