AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual - Manual (Page 349)

Wiring, Pinouts and Schematics 343
© 2014 AEM Performance Electronics
Digital Switch Inputs
Common digital switch inputs used in electronic fuel injection applications are oil pressure
switches, clutch switches, A/C request input, hi/lo boost switch, race gas switch, etc. For all
digital inputs that will be used with a switch, the wiring is simple.
Source any SPST (single pole single throw) switch. Note: Normally open (N.O.) and normally
closed (N.C.) switches can both be used. The Infinity Tuner software can invert the logic to exactly
what the user needs.
Find a good ground source near the switch mounting location. If there is oil, rust, paint, etc.,
present, use a wire brush to clean the area for a proper connection. Most ground connections are
used with a ring terminal (as shown below). Route one of the switch terminal to this ground point.
In the Application Notes, find an available unused Digital_In_X input on your specific Infinity.
Route the other terminal of the switch to this Infinity ECU pin.