yellow wire on AAC

[rb250sx]

The yellow wire that comes off the purple plug on the AAC is not connected on my rb25 s2, i posted before but im assuming everyone has it all in conduit. My car idles great when i start it up, but if i drive it around a bit then let it idle, the idle drops and if i turn the car off and try to start again it usually goes even lower, sometimes to the point where it wont start again. I think this purple plug is the high idle actuator correct? however its not on the s1 wiring diagram anywhere. I believe this could be related to my problem, does anyone know where this yellow wire connects into?