Tachometer: Testing and Inspection

Tachometer:

Fault symptoms
Tachometer inoperative.

Diagnostic help
A reading of the current engine speed can be obtained with the diagnostic tool.

The diagnostic tool can also be used to activate the tachometer.

Check the wiring harness
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic tool during the test.