Kohler 25-150 kW GM and PSI Models Industrial Generator Sets Wiring Diagrams (tp6799)

These Kohler 25–150 kW GM and PSI industrial generator sets usually sit in plants, commercial buildings, or backup rooms and only get noticed when the lights go out. This wiring diagram set is what I’d pull when I need to trace control circuits, verify harness routing, or confirm a retrofit is wired safely. If, for example, the set cranks but never picks up a run signal, this document lets me follow the path from the controller, through each connector and splice, to the engine and safety devices to isolate the fault.

Applications & Use Cases

• Trace control wiring from the controller to relays, sensors, and actuators to pinpoint open circuits or shorts.
• Verify harness repairs after replacing damaged loom, making sure each conductor lands on the correct pin.
• Plan accessory installs like remote start/stop or monitoring by identifying safe tie-in points and correct terminals.
• Check connector logic when swapping components between GM and PSI variants so signals aren’t crossed.
• Continuity-test circuits in a logical order, reducing guesswork when chasing intermittent shutdowns or no-starts.

FAQ

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

A: Yes, it’s practical to keep it digital so you can zoom in on connector details while working at the genset.

Q: Is it worth printing parts of this diagram?

A: Many techs print the key sheets they use most, mark test results on them, and keep them with the unit’s service file.

Safety Note

Always de-energize and lock out the generator before opening panels or disconnecting any wiring.