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 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, 25°C at (77°F)