Ce-niehoff-co C653/C653A/C625 Troubleshooting Guides Manuel d'utilisateur télécharger pdf (Page 9)

Page 9

TG13G

Section D: A2-214 Advanced Troubleshooting (CONT’D)

Repair vehicle circuit to IGN terminal.

Vehicle charging circuit test is complete.

Set DMM to diode test. Connect black lead of DMM to B+ terminal on alternator. Connect red

lead to pin B on harness plug. DMM should read voltage drop. Reverse leads. DMM should

read OL.

Check continuity of thermal switch inside control

unit: Remove drive end cover on alternator. With

DMM, check continuity between pin B on harness

plug and diode shown in Figure 9 below. Does

continuity exist?

Yes

Alternator is

defective.



Thermal switch

in control unit

is defective.



Figure 9 – Diode Arrangement inside C653 Drive End Housing

USE THIS DIODE



Chart 4 – Continuation of Chart 3 as Noted

1 2 3 4 5 6 7 8 9 10 11

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Ce-niehoff-co C653/C653A/C625 Troubleshooting Guides Manuel d'utilisateur Page 9