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Electrical Trying to find wiring diagram

  • Thread starter Thread starter 89 fox 351
  • Start date Start date Mar 9, 2020
8

89 fox 351

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#1
  • Mar 9, 2020
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I've spend the better half of 2 weeks trying to find diagrams for my 1989 5.0 5sp GT and have not come across ones that are accurate. I have a haynes manual, and they are too generic and have too much missing info.

Everyone sent me to the "veryuseful" site that has diagrams from tmoss but they are not accurate. the pins are wrong, and many wire colors are off.

So I bought a 1989 mustang full service manual from "emanualonline" and boy was that a waste of money. The entire electrical section is blurry and unreadable. (i've contacted them about it and they are fighting me about refunding my money. I was going to try alldatadiy but i've had mixed results using them.

So where is a good place to get a diagram of the wiring? I need everything front to back, top to bottom. I'm gutting ALL unnecessary wiring, while doing my best to maintain the stock appearance and functions. which means I want the dash and gauges to work, the chimes to work, warning lights... However I'm getting rid of ac/heat, cruise control, efi, a9l computer, and anything else I can dump with the carbed engine swap I'm doing. I should be able to use the stock gauges for everything except maybe oil pressure, which I have a mechanical gauge mounted on the wiper cowl.

I was going to buy a new harness from ron francis wiring, but after tearing the dash out, theres only 64 wires back there, so how hard could it be??!!
 

General karthief

wonder how much it would cost to ship you a pair
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Sorry the pic didn't come out too good, it is an assembly manual, google it, don't remember where I got it it was soooo long ago (can you tell?), I have the receipt, I'll look later.
i think it was Motorbooks, I'll look.
 
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jrichker

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89 fox 351 said:
I've spend the better half of 2 weeks trying to find diagrams for my 1989 5.0 5sp GT and have not come across ones that are accurate. I have a haynes manual, and they are too generic and have too much missing info.

Everyone sent me to the "veryuseful" site that has diagrams from tmoss but they are not accurate. the pins are wrong, and many wire colors are off.

So I bought a 1989 mustang full service manual from "emanualonline" and boy was that a waste of money. The entire electrical section is blurry and unreadable. (i've contacted them about it and they are fighting me about refunding my money. I was going to try alldatadiy but i've had mixed results using them.

So where is a good place to get a diagram of the wiring? I need everything front to back, top to bottom. I'm gutting ALL unnecessary wiring, while doing my best to maintain the stock appearance and functions. which means I want the dash and gauges to work, the chimes to work, warning lights... However I'm getting rid of ac/heat, cruise control, efi, a9l computer, and anything else I can dump with the carbed engine swap I'm doing. I should be able to use the stock gauges for everything except maybe oil pressure, which I have a mechanical gauge mounted on the wiper cowl.

I was going to buy a new harness from ron francis wiring, but after tearing the dash out, theres only 64 wires back there, so how hard could it be??!!
Click to expand...
I have the fix for your problem...

PM me your email address and I will send you a complete Ford Factory 89 Mustang electrical diagram set. The zip file is 2.5 MB and is too big to fit through Stangnet's email gateway.

The plug shapes on the diagrams match the plug shapes on the actual plug. The diagram is divided up by the layout of the car. The first diagram is for the very front of the car, and it works its way to the rear of the car page by page.

They are in a zip file format to reduce the size of the package. If you don't have Windows 7 or Windows 8, or later, you’ll need WinZip or other Windows archive tool to extract them from the zip file.. See www.majorgeeks.com - Download Freeware and Shareware Computer Utilities for a free download.

You will need the Adobe Acrobat viewer which is also a free download – www.adobe.com/products/acrobat/readstep2.html - Adobe Reader download - All versions
 
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89 fox 351

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  • Mar 10, 2020
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PM sent thank you!
 

Blown88GT

Founding Member
Nov 13, 1999
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Mar 10, 2020
#5
  • Mar 10, 2020
  • #5

1988 Mustang Electrical & Vacuum Troubleshooting Guide (EVTM)

File is too large to upload. Here is link to it on my Google Drive. View: https://drive.google.com/open?id=1on5czXKmpETzxUggWTGtoUuVkJT2UUxN
www.stangnet.com
 
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theconductor

15 Year Member
Aug 9, 2007
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Roseville, CA
Mar 12, 2020
#6
  • Mar 12, 2020
  • #6
jrichker said:
I have the fix for your problem...

PM me your email address and I will send you a complete Ford Factory 89 Mustang electrical diagram set. The zip file is 2.5 MB and is too big to fit through Stangnet's email gateway.

The plug shapes on the diagrams match the plug shapes on the actual plug. The diagram is divided up by the layout of the car. The first diagram is for the very front of the car, and it works its way to the rear of the car page by page.

They are in a zip file format to reduce the size of the package. If you don't have Windows 7 or Windows 8, or later, you’ll need WinZip or other Windows archive tool to extract them from the zip file.. See www.majorgeeks.com - Download Freeware and Shareware Computer Utilities for a free download.

You will need the Adobe Acrobat viewer which is also a free download – www.adobe.com/products/acrobat/readstep2.html - Adobe Reader download - All versions
Click to expand...

Holy hell, can you do this for me for a 92?
 

jrichker

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theconductor said:
Holy hell, can you do this for me for a 92?
Click to expand...
I only have 1989 Mustang wiring diagrams. The 91 and 92-93 are very different for the fuel pump wiring and component locations.
 
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theconductor

15 Year Member
Aug 9, 2007
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Roseville, CA
Mar 13, 2020
#8
  • Mar 13, 2020
  • #8
jrichker said:
I only have 1989 Mustang wiring diagrams. The 91 and 92-93 are very different for the fuel pump wiring and component locations.
Click to expand...


Bummer!
 

Mustang5L5

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#9
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theconductor said:
Bummer!
Click to expand...

Locate A 1992 EvTM. Pricey, but worth it



I do have one if you need me to photo one specific wiring diagram
 
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fun331

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Mar 14, 2020
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I bought the same manual as @General karthief from Ebay last year after reading one of his posts. It's the best I've read by far. Think I paid $50-60 for it. Found one for the 92 but it's two different manuals and pricey. http://rover.ebay.com/rover/1/711-5...0001&campid=5335821607&icep_item=312882059107
 
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P

Paulcw1

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I know this is an old thread but I'm in need of the 89 EVTM as well (need the wiring diagrams/schematics). Maybe jrichker could send it to me too. TIA
 
P

Paulcw1

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#12
  • Aug 6, 2021
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Blown88GT said:

1988 Mustang Electrical & Vacuum Troubleshooting Guide (EVTM)

File is too large to upload. Here is link to it on my Google Drive. View: https://drive.google.com/open?id=1on5czXKmpETzxUggWTGtoUuVkJT2UUxN
www.stangnet.com
Click to expand...
Hi, Would you happen to have this for an 89? My shop tells me that the 89 is unique and they don't want to make a mistake using the 88 diagrams. TIA
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,249
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224
Massachusetts
Aug 6, 2021
#13
  • Aug 6, 2021
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I have both the 88 and 89 evtm. They are 99% identical with only a few differences pertaining to the MAF wiring and pin 30 wiring. You can use the ‘88 EVTM for pretty much all other wiring. I can screen ahot the relevant pages out of the 89 EVTM that are different.

You can also buy one here

Ford Mustang - Evtm 1989 Shop Manual - Paper Book | eBay

Vehicle ModelMustang - Evtm. This is essentially the “How to Fix It” book. PURCHASING POLICIES. Contains Information OnElectrical/Troubleshooting Only. Approximate Page Count142.
www.ebay.com
 
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R

RETimmons

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Sep 21, 2025
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1
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Sep 21, 2025
#14
  • Sep 21, 2025
  • #14
jrichker said:
i have the fix for your problem...

PM me your email address and I will send you a complete Ford Factory 89 Mustang electrical diagram set. The zip file is 2.5 MB and is too big to fit through Stangnet's email gateway.

The plug shapes on the diagrams match the plug shapes on the actual plug. The diagram is divided up by the layout of the car. The first diagram is for the very front of the car, and it works its way to the rear of the car page by page.

They are in a zip file format to reduce the size of the package. If you don't have Windows 7 or Windows 8, or later, you’ll need WinZip or other Windows archive tool to extract them from the zip file.. See www.majorgeeks.com - Download Freeware and Shareware Computer Utilities for a free download.

You will need the Adobe Acrobat viewer which is also a free download – www.adobe.com/products/acrobat/readstep2.html - Adobe Reader download - All versions
Click to expand...

jrichker,

would you be able to send me that zip file!? im currently working on my 89 GT, and would greatly appreciate it if you would!
I was going to PM you to ask instead of replying on this post, so i could give you my email, but the site for some reason isn't letting me open any profiles to be able to message. If you would be able to pm me, ill send you my email
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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#15
  • Sep 21, 2025
  • #15
RETimmons said:
jrichker,

would you be able to send me that zip file!? im currently working on my 89 GT, and would greatly appreciate it if you would!
I was going to PM you to ask instead of replying on this post, so i could give you my email, but the site for some reason isn't letting me open any profiles to be able to message. If you would be able to pm me, ill send you my email
Click to expand...
No he can't, he is no longer with us, his vast knowledge and words of wisdom lives on here on and prolly googlefu too, I'll look around but someone more savvy in searching finds it first.
 

DadLife0724

Active Member
Mar 22, 2024
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53
Cooperstown, PA
Sep 21, 2025
#16
  • Sep 21, 2025
  • #16
Those are pretty awesome manuals. What's the issue with the haynes manual? The one I have is pretty accurate and easy to follow, albeit tiny. A quick snap of the dumb phone camera and zoom is pretty helpful.
 
Last edited: Sep 21, 2025

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,249
17,934
224
Massachusetts
Sep 21, 2025
#17
  • Sep 21, 2025
  • #17
The EVTM PDFs can be purchased here. You can also purchase specific paper copies as well

https://lmr.com/item/LRS-WM8793/newrad-solutions-mustang-electrical-vacuum-manual-usb-87-93

https://lmr.com/item/BSK-6797/bishko-mustang-electrical-vacuum-troubleshooting-manual-1989


I like the pdf version because you can search

If you have a specific request I can screen grab a page
 
Reactions: DadLife0724

evintho

20+ Year Stangneter
Nov 12, 2003
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Santa Rosa, CA.
Sep 21, 2025
#18
  • Sep 21, 2025
  • #18
RETimmons said:
jrichker,

would you be able to send me that zip file!? im currently working on my 89 GT, and would greatly appreciate it if you would!
I was going to PM you to ask instead of replying on this post, so i could give you my email, but the site for some reason isn't letting me open any profiles to be able to message. If you would be able to pm me, ill send you my email
Click to expand...
The EVTM's are good but factory wiring diagrams are the pinnacle of wiring diagrams. They're what the factory Ford technicians used in the dealerships, back in the day. They cover every wire, connector, color and gauge of wire in the car from source to component and are extremely simple to read. I've bought a FWD for every project I've ever done. Wouldn't start one without it!

1989 Ford Mustang Wiring Diagrams Manual | eBay

This Wiring Diagrams Manual provides factory-correct information for 1989 Ford Mustang Wiring Diagrams Manual. Approximate manual size: 17 x 24. Official OEM reprint. Factory Wiring Diagrams. Vehicle coverage: 1989 Ford Mustang.
www.ebay.com
 
Last edited: Sep 21, 2025
Reactions: AeroCoupe, gkomo, DadLife0724 and 1 other person
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