Delco Remy CS130 Alternator Repair Instructions, Page 5

STATOR CHECKS

If an ohmmeter reads low or lamp lights when connected from an stator lead to bare metal on the test the delta stator for shorts or opens. Noticeable discoloration at any place on the assembly usually indicates defective stator windings.

RECTIFIER BRIDGE CHECK

The rectifier is the number one failed component on the CS-130 alternator. To check rectifier bridge, connect ohmmeter using low scale from bridge terminal to heat sink, then reverse connections (Figure 8). If both readings are the same. replace the rectifier bridge. Connect from other two terminals to heat sink in same manner to check other two diodes. Connect between three terminals and base plate (Figure 8) to check remaining three diodes in rectifier