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Cummins/Onan — 20

For these Cummins/Onan models: 15.0 HA - 21 - a, 7.5 HA - 21 - a.

Applies to: Cummins Onan 15 0 Ha 21 A, Cummins Onan 7 5 Ha 21 A

Procedure

  1. 12. Check the two rectifiers on the right side of the board in the same manner as the other rectifiers. Resistance should be high in one direction and low in the other. If resistance is zero or extremely low in both directions, replace. Onen Onan Corporation
  2. 1400 73rd Avenue N. E.

Source: manual:907-0500 Onan HA Auto Demand Control Service Manual (06-1984).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.