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Caterpillar — Test Step 3. CHECK CONNECTIONS OF: Test Step 4. CHECK THE RESISTANCE

A Caterpillar service procedure — check it applies to your exact model before use.

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Procedure

  1. A. Turn off the genset.
  2. B. Check if there is the jumper between terminals
  3. 4 and 7.
  4. 4 and 7.
  5. 7. The regulator may go into the overexcitation

Source: manual:CAT VR6 Service Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.