87 mustang o2 harness

[warriorpluto]

was putting my harness back together(o2 sensor part of harness and i see two wires that are clipped. one is black and the other is kind of orange looking. how do i hook these back and where do they go?

View attachment 249756

 

[jrichker]

The orange wire is the O2 sensor heater ground. It normaly connects to the computer harness and grounds on the back of the cylinder head or intake manifold.
The black/green wire is the O2 sensor signal return for the computer.

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

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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

 

[flasch192]

anybody kno where i can get that exact harness in the pic mines missing

 

[stykthyn]

JY or want ad classifieds.

 

[warriorpluto]

ok thanks i just printed that out. thats all i wanted to know. i knew one was for the oil level and other was ground but didnt know which. so on the cut ground what kind of wire do i use to extend the ground to the lower intake? gonna try to get it cranked up today.