Not being happy with the dash loom being wrong, I tracked down a guy braking a STI V2, so I had the lot off him.
Takes ages to get out! Also took the opportunity to swap the dash out for a mint one. The one I had in it had slight blue paint spatter on the sides. Barely visible, but I knew it was there.
This means the IC spray now works again.
The old loom didn't have the plug for the IC Button, or the connector for the IC timer that sits up inside the dash.