Wiring a P series VAM into a 88-90 Mustang
(this is for when your doing a 2.3 turbo swap with a computer other than a LA, LB, 8UA series)
[/size][/size] [/align]Splice into/connect the VRef (orange/white) to the wire going to pin 26 of the stock harness (also orange/white). (I say splice into/connect the wire running into the engine bay. This is because pin 26 is being used by the TPS, MAP, and EGR.)
Remove Pin Connector #3 from LX wire harness red block (or take one from your harness you salvaged, and put this pin connector and wire into the red block of your LX harness to plug into your Pin 43 position on the P series computer. The LX harness lacks this connecting pin).
Connect the VAF (white/black) to the wire going to pin 43 of the stock harness (the new connecting pin you just put in)
Connect the VAT (vain air temp) to pin connector #27 (this can be found at your EGR Valve position sensor) Now move that pin #27 to pin #25 and move #25 to an area with no pin (this is the ACT sensor which only the PE, and 87-88 turbo coupe computers can use)
Splice into/"T" connect the VAM signal return (black/white) wire into the LX harness (black/white) wire that goes to pin 46. Do not cut the LX harness (black/white) wire going into pin 46, simply connect this VAM signal return black/white wire to it.