Cummins/Onan DL3 — Start Solenoid Checkout

Testing & diagnosis · Start solenoid K11

For the Cummins/Onan DL3, from the Cummins/Onan service manual.

Applies to: Cummins/Onan L Series Diesel engine

Procedure

1. Apply 12-volt battery positive (+) to the K11 coil terminal S.
2. Connect a wire from the battery negative (-) to coil terminal 1; the solenoid should activate.
3. If contacts are good, zero resistance should be read across the large terminals when coil is activated.
4. Voltage drop across the contacts should never exceed one volt in circuit application.

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.

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