Ignition Rotor: Testing and Inspection

Component Overview--Replace O-rings When Servicing Distributor:

1. Remove the screws securing the distributor cap to the distributor.
2. Confirm that the rotor does not turn on the distributor shaft.
3. Remove the rotor from the distributor shaft.
4. Visually check the rotor for signs of "Burn Through" from one circuit to the other.
5. Check the input (center) contact for excessive carbon build-up and corrosion.
6. Check the output (outer) contact for excessive carbon build-up and corrosion.
7. Using an ohmmeter, check for continuity between the input (center) electrode and the output (outer) electrode.

Replace the rotor if it fails any of the above tests.