ALTERNATOR & REGULATOR
1) Place ohmmeter on X 100 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. Replace diode assembly if defective.
Fig. 1: Testing Diode Assembly
Courtesy of Volkswagen United States, Inc.
STATOR
1) Place ohmmeter on lowest scale. Connect ohmmeter across
stator leads. Resistance should be approximately .09-.10 ohms. If
resistance is incorrect, stator has open or shorted windings and must
be replaced.
2) Place ohmmeter on X 1000 scale. Connect ohmmeter between
stator core and stator lead. No continuity should exist. If continuity
exists, stator is grounded and must be replaced.
ROTOR