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Ask Hank F. Your Own Question
Hank F.
Hank F., RV tech - emphasis on gensets
Category: RV
Satisfied Customers: 14993
Experience:  RV tech since the beginning of the millenium.
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Onan HDKAJ. It started clicking while not in use. The

Customer Question

Onan HDKAJ. It started clicking while not in use. The indicator light on the switch was steady on. The clicking is the fuel pump. If I unplug it, the light goes to 3 flashes, pause & repeat. I cannot get a secondary error code, despite pressing either switch to the stop position. Just 3 flashes, pause, 3 flashes and the same pause length. I pulled all three fuses, which put it back to the first condition (light on, fuel pump clicking).
The first time the gen did this, I messed with both switches and somehow the error condition cleared. The generator started and ran okay. The next day (without further use of the generator) it went back to the status light steady on and the fuel pump clicking.
Submitted: 1 year ago.
Category: RV
Expert:  peterpete190 replied 1 year ago.

My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.My info is somewhat limited on your model here but I had seen no one else has responded and would like to see if I can help here.If at any time you feel that I cannot help with this please let me know.

Check for any shorted or damaged wiring on the generator itself to see if this is causing the fuel pump to click like this here.In some cases shorted wiring can cause an issue like this here.If this is or has been checked and found o.k. let me know so we can continue.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Customer: replied 1 year ago.
Previously, I disconnected the remote start/stop switch and inspected all wiring to the generator. No change. I reconnected the remote switch and disconnected the switch on the generator. No change. I've changed the fuel filter, and the fuel pump did the normal "chatter" while it primed the filter, then it returned to the clicking state that I can interrupt by disconnecting the fuel pump, then reconnecting. I'm comfortable saying there is no possibility of chaffed or severed wiring external to the generator, or at the switch panel or fuel pump, which is as far as I can access with the generator still in the RV chassis.
Expert:  peterpete190 replied 1 year ago.

O.k.,unfortunately this is all of the info I have on this myself here.

I will open your question up for others here to see if someone else can assist further on this as there may be others here that may have more info on what to check or do with this issue.I hope you can get this resolved with ease.No need to reply to my last post here unless it is a last resort as it will keep your question locked to me and others will not be able to view it.If you feel you want to continue to work with me on this feel free to reply at any time but keep in mind in some cases it can be difficult to fully diagnose or help repair this without seeing your vehicle.

Thanks Pete

Expert:  Hank F. replied 1 year ago.

If the fuel pump is running on its own, even with the remote disconnected, and you have no shorts in the wiring, it means that the inverter has gone bad and will need to be replaced.

There is no repair for an inverter.

Customer: replied 1 year ago.
The inverter has nothing to do with the control of the generator engine, it just converts the DC voltage to AC.I don't consider your answer to be acceptable, and this inquiry isn't getting any closer to a diagnosis.