Alternator Service Manual
For Delco Remy CS130 and CS121 Series Alternators, Page 2

CLICK HERE for CS130 REPAIR PARTS
CLICK HERE for COMPLETE CS130 ALTERNATORS
  • Years Used: 1986-1996
  • Amperages: CS-130/85-105 amps CS-121/61-74 amps
  • Used as the most common standard unit on GM Cars & Light Trucks. Also used in Industrial, Marine, Agricultural and other applications.

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



CS130 Stator and Bridge Rectifier Check