Rectifier Check

Check the continuity between the positive rectifier and the stator coil lead connection terminal with a tester. If there is continuity between the terminals, the diode is shorted, so replace the rectifier.

Fig 1: Checking Continuity Between Positive Rectifier And Stator Coil Lead Connection Terminal
Courtesy of DAIMLERCHRYSLER CORPORATION
Check the continuity between the negative rectifier and the stator coil lead connection terminal with a tester. If there is continuity between the terminals, the diode is grounded, so replace the rectifier.

Fig 2: Checking Continuity Between Negative Rectifier And Stator Coil Lead Connection Terminal
Courtesy of DAIMLERCHRYSLER CORPORATION
Check the continuity of the three diodes by connecting an ohmmeter to both ends of each diode. If there is continuity between the directions, or if there is no continuity, the diode is damaged, so replace the rectifier.

Fig 3: Checking Continuity Of Diodes
Courtesy of DAIMLERCHRYSLER CORPORATION