LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 1987 >> 560SL >> Repair and Diagnosis >> Electrical >> Charging Systems >> Generators & Regulators >> On-Vehicle Testing >> Testing & Repair >> Diode Assembly
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diode Assembly

  1. Place ohmmeter scale on x100 scale. Connect ohmmeter leads across "B+" terminal and 3 stator terminals one at a time. Reverse leads. Ohmmeter should indicate continuity in one direction only.
  2. Connect ohmmeter leads across negative plate and 3 stator terminals one at a time. See Fig 1. Reverse leads. Ohmmeter should indicate continuity in one direction only.
  3. Connect ohmmeter leads across "D+" terminal and 3 stator terminals one at a time. Reverse leads. Ohmmeter should indicate continuity in one direction only. If diodes are found to be defective, replace diode assembly.
Fig 1: Bosch Diode Assembly Test Diode assembly for 55-amp alternator is shown. Others are similar.
G29438
scientia non olet · About LEMON Manuals