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Home›Repair guides›700 ohms in one direction, infinity in the other.

Cummins/Onan — 700 ohms in one direction, infinity in the other.

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. 7. Rectifier CR1 normally has 600 ohms in one direction, infinity in the other direction.
  2. 8. Using the RX41 scale, check resistor Resistance should be 55 ohms.

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.