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Electrical O2 harness repin

  • Thread starter Thread starter Mustang5L5
  • Start date Start date Jan 27, 2019
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Fox2newedge

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#21
  • Jul 23, 2025
  • #21
Ok, I will give it a try once I get the harness back in the car (I took it out to clean it up). If there is power, what is the solution?
Thanks again!
 
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Fox2newedge

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#22
  • Jul 23, 2025
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Also, I found this article with reference to adding some leads from the trans harness and fuel pump relay. Have you seen this and any chance you may know if it's accurate?

https://stangnet.com/2002/01/23/mustang-mass-air-conversion/
 

Noobz347

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#23
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  • #23
Fox2newedge said:
Also, I found this article with reference to adding some leads from the trans harness and fuel pump relay. Have you seen this and any chance you may know if it's accurate?

https://stangnet.com/2002/01/23/mustang-mass-air-conversion/
Click to expand...

That thread is for converting a Speed Density Harness to Mass Air [specifically].
 
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Fox2newedge

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#24
  • Jul 24, 2025
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Yes, but about half way down he talks about splicing into the fuel pump relay and pinning it to pin 19 and then putting jumpers from the org/yel and grn/wht wires in the trans harness to pins 6 and 3 respectively to prevent stalling problems.
I was preparing to do this, as I don't want to have to take the seats/carpet out again, but am not sure if it's necessary or incorrect advice.
Again, thanks for any guidance, it's truly appreciated.
 

AeroCoupe

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#25
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Pretty sure all the fuel pump relay wiring is over in the driver kick panel.
 
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