Electrical 87-89 Dash Harness

  • Sponsors (?)


Sounds like either the neutral safety switch or the clutch switch isn't wired up. You can tap into the wire ( red with blue stripe...I think) from the ignition switch in the column to the solenoid. The neutral safety switch harness runs through the trans tunnel by the shifter.
 
That problem is solved. Thamls everyone for the help. THE PROBLEM WAS THE CLUTCH PEDAL SWITCH. I FORGOT TO PLUG THE RELAY JUMPER CONNECTOR BACK IN. Now on to the new problem . The dang turn signals will not work. Also the blower will not work. The passenger side flasher works though
 
  • Like
Reactions: 1 user
Check the fuse for the blower.

Diagrams courtesy of Tmoss & Stang&2birds

Fuse box layout
MustangFuseBox.gif


Mustang 5.0 Lights and Radio schematic, by TMoss:
mustangFoxLights-Radio_diag.gif


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

94-95 Mustang wiring diagrams
Mustang FAQ - Wiring & Engine Info

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 for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

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

O2 sensor wiring harness
http://www.veryuseful.com/mustang/tech/engine/images/mustangO2Harness.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 & pin out
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

Mustang 5.0 Lights and Radio schematic, by TMoss:
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxLights-Radio_diag.gif

87-92 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang87-92 PowerWindowWiring.gif

93 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang93PowerWindows.gif

T5 Cutaway showing T5 internal parts
http://www.veryuseful.com/mustang/tech/engine/images/5_Speed_Cutaway_Illustrated.jpg

Visual comparison of the Ford Fuel Injectors, picture by TMoss:
http://www.veryuseful.com/mustang/tech/engine/images/Ford_Injector_Guide.jpg

Convertible top motor wiring http://www.veryuseful.com/mustang/t...ch/engine/images/mustang88VertTopMotorCkt.gif
 
Did you plug the fan control wiring harness into the HVAC control panel and into the blower speed control resistor pack that lives in the A/C duct?

I highly recommend that you spend some time viewing Mustang FAQ - Wiring & Engine Info . That's where most of the diagrams and information you need can be found.

Diagrams courtesy of Tmoss & Stang&2birds
A/C and heater wiring
mustang88AC_Controls.gif


HVAC vacuum diagram
Mustang_AC_heat_vacuum_controls.gif
 
Last edited:
Good ole burned up ignition switch harness. So nothing on the switch works...no wipers...turn signals...high beams ?
 
Well i have power from the fuse box to the switch. I dont think i have power from the switch though.
I tapped in the wires for the turn signals and i got them to come on. So do you think its a switch? I also had the blower working for a moment when i was messing around woth the steering coloum
 
Sounds like theres a bad connection somewhere. How many power feeds are you getting at the multifunction switch ? Jrichker gave solid info and I believe the wipers and turn signals get separate power feeds to the switch. These cars are known for power feed issues because of the ignition switch harness.
 
Im sorry for all the questions im just so ready to be done with this wiring. I got the blower to work it ended up being a pigtail ground. Jist the turns i cant seem to get to work to be honest i dont know exactly what plug the turn signals are on
 
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.

89 Mustang wiring diagrams zip package–

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

The diagrams show the location area and the connectors are drawn to the same shape as those in the car.

You will need the Adobe Acrobat viewer which is also a free download – Adobe Acrobat Reader DC Install for all versions - Adobe Reader download - All versions
Please send me the complete Ford factory 89 Mustang electrical diagram set to [email protected]. Thanks so much
 
I'd take a look at these three area's to start. Some of this wiring looks suspect at best.
1. Your starter to solenoid wire looks like it's hanging on for dear life. You might want to redo this connector. Possibly with a new starter to solenoid wire. Or a fusion slug (solder prepacked).

2. I'd redo, or buy a new coil repair plug. --> Repair Connector

3. This is part of the ground for the computer... It looks, well, i'm not really sure what it looks like. But I am sure it should be checked.:eek:

LUK!

1.jpg