Stator Opens

NOTE: Delta windings of 15 SI and 27 SI series alternators cannot be checked for open circuits. However, if all other electrical checks are normal and generator fails to supply rated output, but will supply at least 10 amps, windings are probably defective.

Check 10 SI and 12 SI stator for open condition using an ohmmeter set to x1000 scale. Attach ohmmeter leads to any two stator leads, checking each pair of stator leads in succession. See Figure . If either ohmmeter reading is high (infinity), windings are open. Replace stator assembly.