LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1991 >> Cutaway 7.3 M >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Alternator - Models W/External Regulator >> Bench Testing >> Diode Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diode Testing

  1. Adjust ohmmeter to the x1 scale. Remove rectifier assembly from alternator. Place ohmmeter probe on terminal bolt. Touch remaining probe on each of 3 stator lead terminals. Note ohmmeter reading. Reverse probes and repeat test.
  2. Diodes should show a reading of approximately 6 ohms in one direction, and infinite readings with probes reversed. Repeat test for remaining set of diodes using other terminal bolt. Replace rectifier assembly if readings are not within specification.
scientia non olet · About LEMON Manuals