well to make a long story short i sold my stock baja tach because i was told it would not work with my msd ignition. Now gary has found out that you can put the trigger wire to the msd coil and it will work. He is my problem. I bought a used stock baja tach and it has three wires. red, black and green, i assume green is the trigger and would go to the coil and black is the ground and I connected that to a black wire with nothing connected to it under the dash but cannot find the red wire that was plugged into my old tach. can someone plz help me on the wiring for this. I had this tach before just totally forgot how it all goes. thanks kyle