Reinstalling my 95 vortech supercharged engine after taking it apart three years ago. Couple problems. I have two oil switches a long and a short, one has 3 pins in it, one has 1 pin in it. I found the the three pin and plugged it in, car still needs intake and front brackets and accessories so I can't start it. But the switches are in a tee that has an oil feed hose attached to supply oil to the supercharger. I have looked for hours for the other switches plug and can't find it. Is it possible that it was never hooked up from the previous owner. I took it apart 3 + years ago and can't remember. I have found every other wire except that one. What does the single pin switch operate, I know it's oil but for a light, digtal guage, computer, analog guage? I also have another switch or sensor that goes down by the oil filter, is tgat the oil temp or the book shows water temp right above the oil filter. Is there a pressure, temp ,and fuel pump oil pressure switch. I'm confused as to the fsm showing three switches.when I got the engine back from the machine shop they plugged all holes so now I don't know which ones were used before. I think ones is for oil pressure to turn on fuel pump, one is oil temp, and one is oil pressure. Lt1 engine. Thanks for any help. Now it's back to the back of the engine to look for the missing plug for the two switch setup at the top rear of engine.