LEMON Manuals: Even more car manuals for everyone
Home >> Saab >> 2005 >> 9-2X Linear, 253, Automatic >> Repair and Diagnosis >> Electrical >> Starting/Charging Systems - 2.5L >> Adjustment - Replacement >> Generator >> Inspection >> Diode

Adjustment - Replacement: Generator: Inspection: Diode

IMPORTANT: Never use a mega tester (designed for reading high voltage) or any other similar instrument for this test; otherwise, the diodes may be damaged.

Checking positive diode

Check for continuity between the diode lead and positive side heat sink. The positive diode is in good condition if resistance is 1 O or less only in the direction from the diode lead to heat sink.

Fig 1: Checking Positive Diode
G03873937Courtesy of SAAB-SCANIA OF AMERICA, INC.
  1. Diode lead
  2. Heat sink (positive side)

Checking negative diode

Check for continuity between the negative side heat sink and diode lead. The negative diode is in good condition if resistance is 1 O or less only in the direction from the heat sink to diode lead.

Fig 2: Checking Negative Diode
G03873938Courtesy of SAAB-SCANIA OF AMERICA, INC.
  1. Diode lead
  2. Heat sink (negative side)
scientia non olet · About LEMON Manuals