Kohler 400-1300REZCK, 500-1000REZK Industrial Generator Sets Wiring Diagrams (TP6994 1018B)

These Kohler industrial generator sets usually sit in plant rooms, data centers, or outdoor enclosures and only get noticed when everything else goes dark. This wiring-diagram manual is what I grab when I need to trace circuits, confirm connector pinouts, and make sure a harness repair won’t cook a controller or breaker. If, for example, the set won’t accept a start signal from the transfer switch, I use this document to follow that control wire from the ATS terminals, through each plug and splice, right into the generator’s control inputs.

Applications & Use Cases

• Trace control and sensing circuits to isolate no-start, no-crank, or no-exercise issues.
• Verify wire routing and connector locations after replacing or rebuilding a damaged harness.
• Check pin assignments before adding monitoring gear or integrating with a new ATS or BMS.
• Continuity-test suspect wires end‑to‑end without guessing which cavity or terminal is which.
• Confirm proper ground and power feeds to modules before condemning a controller or relay.

FAQ

Q: Can I use this on a tablet or laptop in the field?

A: Yes, it works well digitally so you can zoom into connector details and follow circuits more easily.

Q: Is it worth printing parts of this manual?

A: Many techs print the key diagrams they use often and keep them in a plastic sleeve at the genset.

Safety Note

Always de-energize and lock out the generator and connected equipment before probing or rerouting any wiring.

Kohler 400-1300REZCK, 500-1000REZK Industrial Generator Sets Index:

• Front Cover
• ProductIdentificationInformation
• Introduction/ServiceAssistance
• WiringDiagrams/Wiring DiagramReferenceCharts
• ControllerIdentification
• ADV-5875
• ADV-8782
• ADV-8824
• ADV-8825
• ADV-8834
• ADV-8865
• ADV-8889
• GM95877
• GM98546
• GM98653
• GM99399
• GM100346
• GM100668
• GM101238
• Back Cover

Kohler