Hot wire help

[SMOKEDYA]

On a fox body,I need a wire that is hot at all times ONLY when the ignition is on BUT is ALSO hot when cranking....peace








john

 

[jrichker]

Diagram courtesy of Tmoss & Stang&2birds

Use the Red/green wire coming off the ignition switch. Be sure to fuse it to protect the ignition circuit.
If the circuit will pull more than 2-3 amps, you will need to use the Red/green wire to trigger a relay that draws power from the battery connection on the starter solenoid.



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.

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

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

 

[SMOKEDYA]

I'm asking this cause i'm installing a fast XFI stand alone and they want me to wire a single wire off the fast dizzy to a wire thats hot all the time when the ignition is on as well as when your cranking it.It would be safe to say i could use the Red/green wire? peace






john

 

[HISSIN50]

As you can see, the Red/Green wire that JR noted is what supplies power to the OEM ignition (amongst other important components). You would be hard pressed to find a better source.

 

[SMOKEDYA]

just making sure peace







john