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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

wiring issue from Alternator to Battery

  • Thread starter Thread starter kneith
  • Start date Start date Jul 2, 2009
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TenorPlayinGuy

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Aug 3, 2001
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Canyon Country, Ca
Jul 5, 2009
#21
  • Jul 5, 2009
  • #21
My original power wires were looking great too before i did my swap, then one day the stock splice caught fire, Got myself a 3G from the Zone, and never looked back. Easy peasy to do, and the end result looks a lot better.
 
K

kneith

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Jun 5, 2009
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Jul 9, 2009
#22
  • Jul 9, 2009
  • #22
what does the green wire and the yellow wire do on the voltage regualtor plug
is the green going to the dash, and the yellow merge into the black power wire going to the starter relay?
 

jrichker

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Jul 9, 2009
#23
  • Jul 9, 2009
  • #23
kneith said:
what does the green wire and the yellow wire do on the voltage regualtor plug
is the green going to the dash, and the yellow merge into the black power wire going to the starter relay?
Click to expand...

The green/red wire does 2 things:
1.) It tells the regulator to turn on and supply power to the alternator field winding. The field winding is an electromagnet that helps the alternator convert rotary motion into electricity.
2.) When the alternator output voltage is low, it provides a ground to make the alternator warning light on the dash turn on.

The yellow/white wire is the voltage sense wire that tells the regulator how much voltage drop is in the black/orange wire so that it can increase the voltage to overcome the loss in the wiring.



Diagrams courtesy of Tmoss & Stang&2birds


See the following website for some help from Tmoss (diagram designer) & Stang&2Birds
(website host) for help on 86-95 5.0 Mustang 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 5.0 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 5.0 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 94-95 5.0 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
 
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