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Cummins/Onan — 5. Preparing for Service

For these Cummins/Onan models: HGJAA (Spec A-E), HGJAB (Spec A-E), HGJAC (Spec A-C), HGJAD (Spec A-E), HGJAE (Spec A-E), HGJAF (Spec A-C).

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Procedure

  1. Preparing for Service
  2. InPower Harness Kit (Spec J and later) (0541-1374)
  3. Bypass Control Board Tester (0420-0603)
  4. Bypass Control Board Tester Adapter Kit (0541-1143)

Source: manual:HGJAA, HGJAB, HGJAC, HGJAD, HGJAE, HGJAF Service Manual.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.