Cummins/Onan — Fuel Solenoid Checkout (F)
Testing & diagnosis
From a Cummins/Onan service manual covering: DL4, DL6, DL6T. Check it applies to your exact model before use.
Applies to: Cummins/Onan DL4, Cummins/Onan DL6, Cummins/Onan DL6T
Procedure
- To check energized-to-run operation, listen for a click in injection pump when start switch is placed in run position.
- If no click and there is power to solenoid, the fuel solenoid must be replaced.
- To check energized-to-stop operation, listen for a click when switch is placed in stop position.
- If no click and there is no power to solenoid, the fuel solenoid must be replaced.
Full service-parts list: Cummins/Onan DL6 →
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.