94 mustang 3.8 wiring harness locations? drove nuts!! what plugs are for what?? - Ford Mustang Forum
 
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post #1 of 13 (permalink) Old 07-04-2012 Thread Starter
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94 mustang 3.8 wiring harness locations? drove nuts!! what plugs are for what??

I got a few figures out, but heres the pictures of the ones i couldnt find what belonged to. I have a split port and windstar intake going on, i know those hoses, but i forget what mustang hoses are what... Please help


..well its sayin it cant let me upload right now? well mainly its the wiring on the drivers side of the harness, the 3 er 4 that continue from the fuel injector plugs...what the hell are they for lol ill upload soon as i can
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post #2 of 13 (permalink) Old 07-04-2012 Thread Starter
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Here we go, these plugs hangin down infront of the heads, almost like a vaccum line connection but theres wires instead of tubing. Then the picture of the 2 hoses comin from the firewall, not sure wat one is wat, and the final picture i dont knw were the final 2 er 3 connecters go to...there not gunna be reconnected the same cuz of my widstar intake, but i unno wat the names are in order to rewire a few i need.
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post #3 of 13 (permalink) Old 07-05-2012
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You are supposed to take lots of pics before you start taking things apart.

Pic 1

1 wire lead on top is temp gauge sender. You will need to tap another hole for this. I will send you a pic later of where I tapped mine when I was going to run that intake

Round plug is temp sensor for the eec

1 wire lead on bottom is oil pressure sensor... Seriously it's like 2 inches under the wire lol


I'll check the other pics later

1990 GT 5.0 - H/C/I
2003 GT - bolt-ons, 87 octane, 252/298 rw
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post #4 of 13 (permalink) Old 07-05-2012
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How can you not figure these out? Don't you have your old parts?

1990 GT 5.0 - H/C/I
2003 GT - bolt-ons, 87 octane, 252/298 rw
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post #5 of 13 (permalink) Old 07-05-2012
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temp sensor option - I had my machinist tap it. The thickness is a little less than ideal, but the location is good. Just don't over tighten it, and use some thread sealer.
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1990 GT 5.0 - H/C/I
2003 GT - bolt-ons, 87 octane, 252/298 rw
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post #6 of 13 (permalink) Old 07-05-2012 Thread Starter
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Haha hey cmon gimme a break lol, the thick group or wires is already coonnected, but thats the only stock thing from the mustang thats left lol, just those 3 dangling i dont know, cause my car is a 94, the parts i have on are all from 02'

I wish i knew thier names is what im tryin to figure out, cuz i dont know if they even connect to this new intake n stuff, even the lower intake is different then the original, and alot of wire and vaccum lines connected to the old intake, its hard to figure where they go now

Im realll close, its only those few lil plug lookin wires, and figuring out something for my MAF sensor, Idle control sensor or watever its called,....im assuming they have to be wired from my mustang harness, to the windstars plugs?? Heres a pic of the intakes connections

So the IAC sensor ontop i can delete? That true also on the lower intake i see the egr connection from the exaust, then a lil hole? Then my thermostat hole, whats that lil one sposed to be all about?

PS i went to the junkyard today and hauled out those injectors, there red, outta a 97 explorer, hooked up bestkind fits dandy too, i appreciate it! lol i also got the pigtail connections for all the sensors on the intake
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post #7 of 13 (permalink) Old 07-06-2012
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Pic 2 is TPS & IAC. I think the TPS connector is the same, but you have to extend it. I would cut one off another car so you can only have one splice. IAC the newer ones use a different connector. I found out our stock connector is the same as a foxbody IAC and there is plenty of those used or if you buy new they cost 1/2 the price is a 99+ 3.8 IAC.

Those firewall hoses are for the heater. I don't remember which is in or which is out or if it even matters.

1990 GT 5.0 - H/C/I
2003 GT - bolt-ons, 87 octane, 252/298 rw
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post #8 of 13 (permalink) Old 07-06-2012 Thread Starter
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In pic 2, theres only the one sensor i thought? The one ontop, cuz the big hole in front was for the throttle body. But the top one is the IAC i figured, i got the correct plug, jus would need to cut the old plug off and reconnect the wires.

Pic 1 is the effed one haha, what do vaccum lines eveen do? How is it possible to know the conections from the lines off the intake, into the mustangs inerts. there has to be a simple, this one goes here and that one goes there way of doing it if anyone knew the actual names of what they are used for

Im out at the car this very seccond wit my laptop on the roof, im not a stupid man, but this effin baffles me. This car dont have a chance of rrunning in my mind, never in my dreams could i think u could do this much altercation, to a motor of all things.
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post #9 of 13 (permalink) Old 07-06-2012 Thread Starter
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K i got most the wires all good to go, i know were there suposed to hook up and i should be able to manage,...this temp gauge sensor...do i need it? is this the temp gauge that shows up in the dash of the car? And were could i find this sensor? Im gunna go look at my old parts, but is there one i can jus unscrew from my old intake? Seeing theres a wire, should be one on my old intake?


And the only other thing i can see is...whats the point of these holes in the valve covers? I know a hose is suposed to connect to them, but i seen sumone just putting nice chrome filterson there, instead of cutting tubing and stuff to make them fit from the intake to the covers... And if i do have to run the tubes, what one does what? Or are both just for putting air pressure down into the covers
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In pic 2, theres only the one sensor i thought? The one ontop, cuz the big hole in front was for the throttle body. But the top one is the IAC i figured, i got the correct plug, jus would need to cut the old plug off and reconnect the wires.

Pic 1 is the effed one haha, what do vaccum lines eveen do? How is it possible to know the conections from the lines off the intake, into the mustangs inerts. there has to be a simple, this one goes here and that one goes there way of doing it if anyone knew the actual names of what they are used for

Not sure what lines you are talking about. You have a Haynes or Chiltons right? I hope so since you swapped your heads. Isn't there a vacuum diagram in there? If not LMK

Im out at the car this very seccond wit my laptop on the roof, im not a stupid man, but this effin baffles me. This car dont have a chance of rrunning in my mind, never in my dreams could i think u could do this much altercation, to a motor of all things.

This is good practice... one day you'll graduate to V8s and be swapping heads and cams in no time.

K i got most the wires all good to go, i know were there suposed to hook up and i should be able to manage,...this temp gauge sensor...do i need it? is this the temp gauge that shows up in the dash of the car?

YES

And were could i find this sensor? Im gunna go look at my old parts, but is there one i can jus unscrew from my old intake? Seeing theres a wire, should be one on my old intake?

YES


And the only other thing i can see is...whats the point of these holes in the valve covers? I know a hose is suposed to connect to them,

READ: Crankcase ventilation system - Wikipedia, the free encyclopedia

but i seen sumone just putting nice chrome filterson there, instead of cutting tubing and stuff to make them fit from the intake to the covers...

If you don't need to be emissions legal then you can do that too. Put a small filter on the end of the valve.


And if i do have to run the tubes, what one does what? Or are both just for putting air pressure down into the covers

They both go to a vacuum source, one side has a valve and one is just straight through

1990 GT 5.0 - H/C/I
2003 GT - bolt-ons, 87 octane, 252/298 rw
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post #11 of 13 (permalink) Old 07-07-2012 Thread Starter
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Yes i do have the haynes, on my laptop tho, i just use it for torque specs n whatnot but it didnt even come to me that those lines would be there thats mint.

i found that sensor no trouble took it out, and was jus taking apart my intake and fuel rail when i noticed the exact same sensor already in the side of the windstars lower intake, ( pic 1 ) i even got the pigtail for it. Basically im prayin this is one in the same n save me the trouble fo finding a guy to tap a hole in my intake on a saturday haha heres a picture, i looked at the picture you uploaded also, seems like that hole is in the same spot on ur intake...but hey this is all off a 02 windstar n i believe ur intake was a split port mustang one, so maybe im in luck for once haha cheers bud

Oh and that long metal pipe comin from the lower for coolant, i know one of my waterpump hoses connects to it, but where does this lil guy on the left fit into the picture?
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You're not getting it. Your car had 1 sender (sensor) for the gauge; and a second one for the eec. That's what it had before, that's what you need to keep with the new setup.

The 99+ Windstar and mustang only had one sensor which the computer used for both gauge and engine control. That's why they only have 1 hole in the intake.

1990 GT 5.0 - H/C/I
2003 GT - bolt-ons, 87 octane, 252/298 rw
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post #13 of 13 (permalink) Old 07-07-2012 Thread Starter
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Thought i was gettin lucky, the sensor im pointin to is the eec then? And im drillin out the temp sensor. (on the stock 94, 2 of the hoses from the waterpump connect to 2 metal necks with a sensor on each, the one i grabbed the temp sensor off. Then the other one is the eec on there then?)

Makin better sense now. i jus about read the entire haynes manual today, haha i think i figured out what vaccume lines to extend into the intake hopefully.

Whats that other rubber hose for?
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