Cummins/Onan — Electronic Control Circuit Board Replacement
Repair & overhaul · Electronic control circuit board (A1)
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Disconnect connector J1/P1 before working on the electronic control system to remove all power to the door.
Procedure
- Disconnect the J1/P1 connector and remove the electronic control circuit board cover.
- Remove the connectors from the control; mark all connectors for reconnection.
- Remove the mounting screws and remove the control board.
- Install the new board and carefully reconnect all connectors.
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.