Originally Posted by Tryintofocus
What would be required to put an external tach on a focus that doesn't have one. That's my goal to do soon but it doesn't seem like it would be a plug and play situation without the proper sensor or whatever. Just curious
The basic tachs are easy to install, most are 4 wires, 1 hot/power, 1 ground, 1 for light and the other taps into the #1 spark plug wire (by wrapping around it) OR taps into the coil packs wiring harness.