Repair and Testing Instructions for T1 Page 41
Alternator 0120 689 552 Edition 001
All rights rest with Robert Bosch Corp, including patent rights. All rights of use of reproduction and publication rest with R. B. Corp.
UA/ASV 04.12.98 T1ALTFinal.DOC
11.3.5 Open Negative Rectifier Diode
This pattern identifies an open negative rectifier diode. In the case of multiple diodes in parallel, all of the
diodes on the circuit must be open. An example is:
There are two diodes in the rectifier for each phase of the stator. Both diodes must be open for this pattern to
appear.
With this type of defect, the rectifier assembly must be replaced.
Figure 43 Open Negative Rectifier Diode
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