Tachometer: Description and Operation

The tachometer is a 6000 RPM tachometer. It has four terminals, labeled B (12 to 14.5 V), S (EDIS Tach Signal In), 0 (Power), and CYL (Cylinder Selection). The CYL (Cylinder Selection) terminal is open in a 4-cylinder engine vehicle, grounded through a 8.66 K ohm resistor in a 6 cylinder engine vehicle and grounded through a 4.32 K ohm resistor in a 8-cylinder engine vehicle.