Got some power issues!

[boostaddict5_0]

I took on someone else's project which he pretty much cut up alot of wires. It's a 1989 Mustang hatchback chassis with a crappy 86 302 HO and a 1990 wiring harness. I finially got the car to turn over by key after finding some ignition wires had been cut. Now I chasing no power to the eec, injectors, fuel pump, power mirrors, and headlights. I've got the wiring diagrams but the main one I'm worried about is the black/orange eec power wire is non existent. I'm kinda unfamilar with foxbody wiring and locations. Oh I can't find the connector for the neutral safty switch harness coming from the AOD.

Anyone want to take swing at this?

 

[2000xp8]

Sounds like you have your hands full.
It may be less work to just source out all new harness's from junk cars/ebay.
89 and 90 mustangs had some noticeable diferences in wiring.
Most used harness's are fairly inexpensive, so if you shop right, you may not need to spend much.

 

[boostaddict5_0]

found out it is a 92-93 wiring harness so I'm assuming the colors are all different.

 

[jrichker]

Diagram courtesy of Tmoss & Stang&2birds

91-93 Mustang 5.0 EFI wiring diagram

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring Mustang FAQ - Engine Information Everyone should bookmark this site.

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

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

Complete computer, actuator & sensor wiring diagram for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for94-95 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/94-95_5.0_EEC_Wiring_Diagram.gif

Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pinout
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif


Typical start circuit...
Diagram courtesy of Tmoss &Stang&2birds

AutoZone wiring diagrams

For 79-88 model Mustangs
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528004e28c

For 89-93 model Mustangs
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c15280069677

For 94-98 model Mustangs
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152801f5e3b

For 1999-2005 model Mustangs
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152801ef7d7

Starter solenoid wiring for 86-91 Mustang

Starter solenoid wiring 92-93 Mustang or earlier Mustang with upgraded high torque mini starter.

 

[boostaddict5_0]

Alright I'm scrapping the 92 wiring harness, there's just to much that has been cut. I going with a 89 wiring harness.

The next problem is that I can't find the location for the neutral safty switch harness coming from the AOD. It's a 4 pin with the white/pink and red/blue. Is it in the car or in the engine bay? I know where the clutch interrupt switch is and it's got the jumper.

 

[2000xp8]

if you plan on keeping the car

http://cgi.ebay.com/ebaymotors/1989-Ford-Mustang-Service-Shop-Manual-Wiring-Diagrams_W0QQcmdZViewItemQQcategoryZ34221QQihZ017QQitemZ270361831459QQrdZ1QQsspagenameZWDVW

You may be able to get it on cd alot cheaper too.
These manuals pay for themselves in no time.

 

[boostaddict5_0]

if you plan on keeping the car

http://cgi.ebay.com/ebaymotors/1989-Ford-Mustang-Service-Shop-Manual-Wiring-Diagrams_W0QQcmdZViewItemQQcategoryZ34221QQihZ017QQitemZ270361831459QQrdZ1QQsspagenameZWDVW

You may be able to get it on cd alot cheaper too.
These manuals pay for themselves in no time.

Thanks for looking that up for me man.

 

[boostaddict5_0]

Alright guys I'm stumped, I'm ready to get this beast running! Here's the problem I finally have power to the computer (jumping power), but the issue is that the 91-93 wiring harness has the fuel pump relay and the wiring is totally different then the pinout. I've posted some pictures so maybe that will help. I really don't have the money to buy another harness and I've heard of this working...so what gives and what am I missing here? Obsively I can only run one fuel pump relay. But the 88 is different than the 91-93 that it looks, is that correct?

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