Tachometer

TACHOMETER INSPECTION
ON -VEHICLE
(a) Connect a tune-up test tachometer, and start the engine.

NOTICE: Reversing the connection of the tachometer will damage the transistors and diode: inside.

(b) Compare the tester and tachometer indications.
If error is excessive, replace the tachometer.
RPM (DC 13.5 V, 25 °C (77° F))