"The oxygen sensor input of your new ECU is connected to the factory EEC o2 sensor wiring (pin 29 for single sensor – passenger side on dual exhaust V8’s). Any aftermarket wideband controllers with a 0-5v linear output will work.
4 wires are available at the stock o2 connector. Wire colors:
Spartan Color Harness Color Wire Purpose
Red 12v Grey/Yellow Keyed 12v Power
Green Signal Out Grey/Light Blue Pin 29 Signal
Black Signal GND Grey/Red Pin 46 (Signal Return)
White HTR GND Black Pin 40/60 (Power Ground)
If you would rather connect Wideband inside the car near the ECU (Cut/Modify Harness):
Red 12v Keyed 12v Power
Green Signal Out Pin 29 Signal (Also Tied to Solid AFR Digital Gauge)
Black Signal GND Pin 46 (Signal Return) or Case Ground Terminal
White HTR GND Pin 40/60 (Power Ground) or Chassis Ground"
This is where I get confused. I'm hooking my WB gauge/controller up inside of the car.
The way this is worded in the setup section is very confusing. It would be so much easier if the Spartan and AEM requirements were separated into two categories. Having arrows going from one controller to a color and back to a different controller/color is unlike anything I've seen. If it were set up like a chart; it would be so much easier to comprehend. I'm not whining but rather describing how I read it. Maybe it's just me?
To add to the confusion; my PIMPXS startup guide states the below for Speed Density Mustangs up to '95. I guess I assumed that the directions are aimed at users doing away with the MAF, thus making their/my car ('94 GT) speed density? To clarify; my car won't be using a MAF.
"If you would rather connect Wideband inside the car near the ECU (Cut/Modify Harness):
Spartan 2 Red 12v → Keyed 12v Power → AEM Red
Spartan 2 Green Signal Out → Pin 29 Signal (Also Teed to Solid AFR Digital Gauge) → AEM White
Spartan 2 Black Signal GND → Tee to Pin 46 (Signal Ret) or Case Ground Terminal → AEM Brown
Spartan 2 White HTR GND → Tee to Pin 40/60 (Power Ground) or Chassis Ground → AEM Black"
My intentions:
AEM wiring inside of car from gauge/controller to PIMPXS: (Speed density vehicles)
Red to switched 12v
Black to ECU case or chassis ground
White 12v reference to pin 29
Blue-Not used.
Please excuse my ignorance. I'm 60 years old and we had no computers when I went to school. It's a minor miracle that I've gotten this far. Lol.
Thanks.