Looking to hook up a tach on my Subaru powered car.  Where do I hook it up?  I hooked up a laptop to the Stinger ECU and it says that the Tachometer output is on circuit three.  Not sure where to hook it up to though.  I have an autometer tach.
Any help I would appreciate it.
Thanks
	
		
			
		
		
	
				
			Any help I would appreciate it.
Thanks