I am leaning toward a pressure switch, but wondered if anyone has done it another way My UTEC has a spare solenoid output, but it occumpied by my N20 setup. The reason for this whole project is that I am trying to integartate the snow performance safe injection into the SMC kit. I need a way to activate the safe injection only when the bump is spraying. The obvious answer is to tap the signal line for the pump. Wrong! They trigger the pump via a square wave progressive ground that sometimes switches polarity?? I am no trying to set up the 2 systems independantly I just need a way to activate both at the same time. This is whay I am thiking of the pressure switch

 

yea these cars a relay hell

 

I ended up using a hobbs (pressure) switch. Works like a charm

 

where did you get the switch? mcmaster carr? grainger?...

 

http://www.atpturbo.com/Merchant2/me...de=ATP-BCS-003

 

go to the source. http://www.alliedelec.com/Search/Pro...B6A1802726617F