What is the clip just below the oil filter for? Still trying to rewire the JDM engine and I am trying to figure out what wire goes here and what wire goes to the A/C pump.

 

I have the wire schematic coming from the ecu, so I can trace that if I know what it is. I am assuming the AC is coming from one of the wires in the dash. Does the FSM have this pin out also?

 

Might make a difference. It is an S5 Turbo

 

got a pic of exactly what you're talking about?

 

Yes, here is a picture.

 

oil pressure to the factory guage

 

Any idea what color this wire should be on the S5 turbo?

 

no sir, that is the coolant temp sender for the gauge.

 

Wow, two people, two answers. Hmmm, anyone else?

 

100% its coolant, the oil pressure will be a bigger (5x the size) and is just above the heater core bung (look on your rear iron...the round piece attached to a brass fitting....thats your oil pressure. the small one you have circled is coolant temp

 

Yep, coolant.

 

100% coolant.
Oil pressure sending unit is right next to it in your pic.

 

+1 coolant for stock coolant gauge (not the ECU)... the wire for that is in the emissions harness and doesn't go to the ECU

the AC wire is in the power (or ignition) harness on the other side of the car.