Cummins/Onan — Troubleshoot - Unstable Voltage with Stable Engine
Testing & diagnosis · Generator / Control
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKBH
Procedure
- Evaluate fault codes
- Check proper output lead connection
- Check genset output voltage
- Check voltage at line side and load side of genset breaker
- Check sense leads and control plugs fully seated
Specs & values
- SRT 00-0AH eBay: 0.3 hour; in-chassis accessibility B
Full service-parts list: Cummins/Onan MDKBH →
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.