Tachometer: Testing and Inspection

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

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




2. Compare the test and the tachometer indications.

DC 13.5 V, 25 °C at (77 °F)