The aquamist willsend a signal (on it's pink or brown wire) when it is switched on which can be used to activate the map switch. In error condition - either flow problem or tank empty it will remove the signal causing the ecu to default back. If you want an external switch to select further mapping in the case of using a different meth/water mix you could use 4D fuel and ignition overlays, triggered by a virtual aux on condition of the digital input from the Aquamist and your meth switch.
scraggles got a reaction from Scott in How to connect Aquamist controller to Link Storm
