Who Knows Wiring? - Ford Mustang Forum
 
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post #1 of 6 (permalink) Old 02-10-2005 Thread Starter
 
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Who Knows Wiring?

Who Knows Wiring?



I don’t.



I bought an ‘84 GT with no motor or tranny (originally carburated). Got a block and tranny but, it was taking too much time and money for me to rebuild it right now, and I found a 5.0 EFI from an ’88 Tbird priced right. So, I’m putting the ’88 Tbird motor in the ’84 GT for now to give me more time to build the GT block right. I need help with the following wires:



2 photos (attached) w/ gray connector (w/ wires labeled 1 thru 9) are from the’ 84 GT. The 2 photos are of the same connector, just flip side.

Wiring diagram in my repair manuals are hard to follow.

I think wire labeled #1 -- the Black/Yellow(dashed) -- might be the upshift lamp indicator wire

Wire labeled #7 -- Green/Yellow(dashed) – might go to the tach





2 photos (attached) w/ black connector (w/ wires labeled 10 thru 17) are from the ‘88 5.0 engine wiring harness. The 2 photos are of the same connector, just the flip side.

Wire # 11 – Red/LiteBlue – may be the neutral safety switch from the ignition switch wire

Wire # 12 – Brown/White – may go from the ignition switch to the EEC

Wire # 14 – Red/ Lite Green – goes to a ‘Y’ fuse link. May go to the coil, distributor, EEC

Wire # 16 – White/Red – may go from neutral safety switch to the starter relay.



Others – I’m clueless at this point.



This is just my best guess from trying to identify these wires using the diagram in the repair manuals. I may not be right at all…If you know wiring and can help me out, please reply. Please identify the wires by the wire number on the attached photos and indicate what they are, where they go, etc.



I’m new to allfordmustangs. Also this is my first time to dig this deep in a 5.0, so your help is greatly appreciated.

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post #2 of 6 (permalink) Old 02-14-2005
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Is the stang going to be injected?
If so, I'd just get all of the wiring harnesses from a Mass Air
Stang, including the engine harness. Or you coul go Speed
Density.
Is the T-bird engine an HO? If not, you'll need the T-bird (or
maybe a truck) computer - and then it should work.
I think the front dress on the T-bird motors might be different
from the Mustang, but that might be true only for the '89 and up
'Bird.
If you are gonna go with a carb, then just get an engine harness from an
'81-'85 V8. '79 and '80 might work too.
Also, check out WWW.Foureyedpride.com , That site should be pretty
helpful.


'88 GT convertible, 5 speed, 3:08 gears, A9L Mass Air conversion. Mac shorty headers and H-pipe, Magnaflow catback.
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post #3 of 6 (permalink) Old 02-14-2005
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H.O. engine in Thunderbird/Cougar = '91-'93 only

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post #4 of 6 (permalink) Old 02-16-2005 Thread Starter
 
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Lite Blue/ Pink Wire

Yes, I pulled all the efi stuff out of the Bird, computer, etc. I just got a tank w/ fuel pump out of an '89 Mustang today.


No, it's not HO... : (
But, on the bright side, the '88 non-HO EFI has more horsepower than the stock '84 carb HO. Also, have a later model 8.8 rear end w/ 3.73's. Hope to add some goodies one day that will make it even more fun, like a cam, etc...

Thanx for the foureyedpride link. Good site.

That lite blue/pink wire runs to pin #34 on the computer. No Mustang wiring/computer diagrams I have shows what this is. It must be something used on the Bird and not on the Stang. Or used on non-HO and not on HO. I still have the Bird but it is at my parents house and I don't get over there often. Already have 2 '84 Stangs in the yard... Don't want the neighbors to get too upset... Guess I'm going to have to get over there and trace that wire on the Bird.

Thanks again.

I just realized the lite blue/pink is on a gray connector that I did not submit a photo. It came off of the Bird.

Does anyone know of any online wiring diagrams?

Last edited by gt84; 02-16-2005 at 12:47 AM. Reason: Ooops -- Wire mentioned not in photos
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post #5 of 6 (permalink) Old 02-16-2005
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Quote:
Originally Posted by gt84
No, it's not HO... : (
But, on the bright side, the '88 non-HO EFI has more horsepower than the stock '84 carb HO.
'88 Thunderbird/Cougar 5.0L engine = 155 HP
'84 Mustang GT/LX 5.0L engine w/ 4V carb = 175 HP

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post #6 of 6 (permalink) Old 02-18-2005
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My FFI & EEC book says that an '88 'Bird (SFI) uses pin# 34 for the "trip-
minder" message center.
I think that some of those old early multiport cars (the more luxuriou$ ones)
had an interactive display which was capable of some light diagnostic tasks.
You'd probably be better off to score the Mustang harnesses, and computer
IMHO. Mass Air is the more desireable setup, it's more adaptable. But you
can still make a Speed Density car maintain 14.7 : 1 (or thereabouts), and
haulass too...

'88 GT convertible, 5 speed, 3:08 gears, A9L Mass Air conversion. Mac shorty headers and H-pipe, Magnaflow catback.
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