Tachometer: Testing and Inspection

INSPECT TACHOMETER
(a) Check the operation
(1) Connect a tune-up test tachometer, and start the engine.

NOTICE:
- Reversing the connection of the tachometer will damage the transistors and diodes inside.
- When removing or installing the tachometer, be careful not to drop or subject it to heavy shocks.




(2) Compare the test and tachometer indications.
DC 13.5 V, at 25°C (77°F)