I am installing a dsp2 switch in my tuck right now i have the ecm out and i was testing the switch one way it grounds the blue wire and the other it grounds the black. thats if the little short black wire is to ground. non of the tutorials show anything about the third wire from the switch. the directions are vague. I dont want to burn up my ecm. the diagram shows one pin through the switch to the other pin. pin 31 to pin 60 or 60 lb7. but my switch does not work like that.??????