Cummins Onan Generator K1 relay
My generator keeps shutting down due to K1 relay turning off fuel pump.
I can straight wire the fuel pump to 12v and all is well.
I’ve replaced the K1 relay two times today, so I don’t think it’s a batch of “bad relays”.
When I put a new K1 relay in, it’ll run for about 5 minutes and shutdown. The fuel pump won’t prime and the generator won’t start after it shuts down. Relay isn’t opening to allow fuel pump to run. I can unplug wire from 87a and fuel pump runs, generator starts and runs. I’m afraid to leave it running with the 87a wire disconnected, thinking it might be some safety feature??
The generator is a Cummins Onan 10kw, hdkca Spec E
Can someone tell me what the K1 relay does? I see from the wiring diagram the “30”wire comes from the controller board fuel pump and the 87a goes to ?G1 ALT VR? What’s the G1 ALT?
Once the relay fails and the fuel pump stops, obviously the Genny stops. And that relay won’t start the Genny again, put in new relay and it starts and runs for about 5 minutes, but now that relay won’t work anymore.
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