LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 1998 >> Metro Base >> Repair and Diagnosis >> Electrical >> Charging Systems >> Bench Testing >> Rectifier Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Rectifier Test

  1. Using an ohmmeter, measure resistance, between each diode lead and upper rectifier body. Perform STEP 1. See Fig 1. Check resistance in both directions by reversing ohmmeter leads. Resistance should be more than 5 ohms in one direction and less than 5 ohms in the other direction. If resistance is not as specified, replace rectifier.
  2. Using an ohmmeter, measure resistance, between each diode lead and lower rectifier body. Perform STEP 2. See Fig 1. Check resistance in both directions by reversing ohmmeter leads. Resistance should be more than 5 ohms in one direction and less than 5 ohms in the other direction. If resistance is not as specified, replace rectifier.
  3. Using an ohmmeter, measure resistance between diode trio leads. Perform STEP 3. See Fig 1. Check resistance in both directions by reversing ohmmeter leads. Resistance should be more than 5 ohms in one direction and less than 5 ohms in the other direction. Replace rectifier if resistance is not as specified.
Fig 1: Testing Generator Rectifier
G98G00618Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals