LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2004 >> Baja Base, Automatic >> Repair and Diagnosis >> Electrical >> Charging Systems >> Generators & Regulators >> Bench Testing >> Diode
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Bench Testing: Diode

CAUTION: Never use a mega tester (measuring use for high voltage) or any other similar measure for this test; otherwise, the diodes may be damaged.
  1. Check for continuity between the diode lead and positive side heat sink. See Fig 1 . The positive diode is in good condition if resistance is 1 ohms or less only in the direction from the diode lead to heat sink.
  2. Check for continuity between the negative side heat sink and diode lead. See Fig 2 . The negative diode is in good condition if resistance is 1 ohms or less only in the direction from the heat sink to diode lead.
Fig 1: Checking Positive Diode
G00211647Courtesy of SUBARU OF AMERICA, INC.
Fig 2: Checking Negative Diode
G00211653Courtesy of SUBARU OF AMERICA, INC.
scientia non olet · About LEMON Manuals