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26SI Series Alternator – Capacitor – Test

    Illustration 1 g00901704

    Capacitor

    (1) Housing

    (2) Terminal

  1. Remove the capacitor from the alternator.
  1. Touch terminal (2) to housing (1) in order to discharge the capacitor.

    Note: Discharge the capacitor after each measurement.

  1. Connect the multimeter leads across terminal (2) and housing (1) of the capacitor.
  1. Measure the resistance.

    Expected Result: The resistance is low for a short period of time. The resistance stabilizes above 100000 ohms.

    Results:

    OK – The resistance stabilizes above 100000 ohms. The capacitor is normal. Repeat Step 2. STOP.

    NOT OK – The resistance does NOT stabilize above 100000 ohms. The capacitor has failed. Replace the capacitor. STOP.