How do you install tach in 87 monty Carlo ss?
In order to install a tachometer on your 1987 Monte Carlo SS,
you must first find the tachometer wire by using an automotive
diagnostic tool. Mount the tachometer on the dashboard. Connect
green, red, black, and white wires to the distributor, ignition
power, cigarette lighter, and headlights, respectively. Turn on the
engine to test if the tachometer works.