tunes67
+1y
Aftermarket Tachs are easy to hook up.. usually only having 3 or 4 wires..
Positive, Negative, Light, and Sensor. The sensor wire hooks to either the + or - of the Coil (depends on what tach you get)
Keep in mind that this is a very general description and you may find tachometers with more or less wires. Most decent tachs also have a slide switch on it to choose between 4,6 & 8 cylinder engines as well. Cheers
Tunes67