Help Needed with Temp guage, T3 engine in ED XR8

[Eaturbo]

As title says i am having trouble getting the temp guage to work in my ED XR8
I am running the AU T3 TE 50 engine and wiring in an ED XR8. I can find the wire going from the Temp sender to the ECU but there must be a wire going from the ECU to the Dash or BCM. I tried tapping straight into the wire at the ECU which is pin 38 but no good. I am not sure if the AU and ED use a different type of temp guage. I can not find anything on the AU BCM or Dash wiring showing a wire to run the temp guage. It shows a few wires on the Dash wiring saying to EFI section than on the ECU wiring it shows 2 wires going into the ECU but it does not say what they do. I can get the ED temp guage to work by grounding it and it will go to full hot so it works. Someone out there must know something about these dam temp guage wiring. I would hate to trouble shoot an AU with a temp guage problem. Any help would be a big help to my poor brain. Thanks Shane