Tachometer: Description and Operation

With the ignition switch in the ON or START position, power is supplied
^ through 1O A fuse [No. (10), located in the fuse block (J/B)]
^ to combination meter terminal (29) for meter and gauges.
Ground is supplied
^ to combination meter terminal (13) for gauges and tachometer, and
^ to combination meter terminal (22) for speedometer
^ through body grounds (M3) and (M90).

The tachometer indicates engine speed in revolutions per minute (rpm).
The tachometer is regulated by a signal
^ from terminal (5) of the ECM (ECCS control module)
^ to combination meter terminal (23) for the tachometer.