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Old 03-20-2019, 07:45 PM   #1
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Water Pump quit working

Looking for a little help on a 1998 Monaco Windsor, 38'.
The 12v fresh water pump has stopped working. I have checked the 20 amp fuse and it is good. I applied 12 volts directly to the pump and it operates correctly.
What am I overlooking?
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Old 03-20-2019, 07:55 PM   #2
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Do you have multiple switches? If so it might be a latching relay
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Old 03-20-2019, 08:15 PM   #3
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Hi JAM3; X2 on the response from Falconman. Just some FYI. The latching relay for your year of Windsor will either be located in the bay where the water pump is located or it could be behind your Tank Level Indicator panel in the coach. My 2000 Windsor had the relay behind the panel and my now 2001 Windsor has the relay in the bay with the water pump.
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Old 03-20-2019, 08:17 PM   #4
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Water pump not working

Yes, I have 2 switches. Neither works.
What and where is the latching relay and how do I test it?
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Old 03-20-2019, 09:41 PM   #5
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Should be close to pump, have you tried following wires from pump.
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Old 03-20-2019, 09:51 PM   #6
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I had the same thing happen last summer and it turned out to be the latching relay. Readily available on Amazon. Not very expensive and easy to change out.
I'm sure there are some good electronics people on here that can tell you how to bypass it so you can operate the pump until you get a new relay.

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Old 03-21-2019, 05:28 AM   #7
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Quote:
Originally Posted by JAM3 View Post
Yes, I have 2 switches. Neither works.
What and where is the latching relay and how do I test it?
Here is a link to Amazon. It will show you what to look for.

https://smile.amazon.com/dp/B00A2TBL...v_ov_lig_dp_it
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Old 03-21-2019, 07:58 AM   #8
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Water pump not working

Thanks to every ones help I may be making progress.
I located a "black box" behind the indicator lights panel and the wires from the water pump switch are connected to it.
This "black box" is labeled "Radio Switch Monoplex".
It has 5 terminals but the one marked "ign" is not used.
Has anyone run across this?
Could this be a work around by a previous owner?
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Old 03-21-2019, 01:43 PM   #9
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Hi Jam3; What you have may have been subbed for the latching relay. Try looking on the net for a Intellitec 10 amp latching relay. Part #00-00145-100. Has only 4 terminals. Should be out there some where. No sure about the radio switch, but if the water pump switch on the panel is connected to that, I am sure you have the controller.
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Old 03-21-2019, 06:29 PM   #10
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Water pump not working

I ordered a latching relay. Does anyone know what wires go to which terminals?
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Old 03-21-2019, 10:15 PM   #11
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Here is a pic of mine...
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Old 03-21-2019, 11:03 PM   #12
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My pump got to where it would not shut off like it didn't have enough power to get to the shut-off pressure. I took the pump apart and everything seemed to be fine so I put it back together and it still did the same thing. No rebuild kit for my pump is available so I put in a new pump. It worked for a while and then it started to not always shut off or just not run when water was called for like it tripped a fuse but just turning it back on would work for a while and then it would quit again. I replaced the relay and that didn't help. I checked voltage at the pump and it had 12-13 volts but wouldn't run. I pulled the pump and hooked it up to a battery and it ran fine. So then I reinstalled it and checked my voltage with the pump hooked up and my voltage was dropping way down. The wire feeding power to the pump goes to the fuse block below the driver seat that is accessible from the outside. I found that wire and the end of it where it connects was dark looking like it had been hot. I cleaned it up and made it a tighter fit when it slid onto the block and my pump has worked great since. Now I am wondering if my original pump is actually ok.
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Old 03-22-2019, 10:08 AM   #13
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The latching relay on my 06 Camelot had power supplied through a 5a fuse. Replaced the fuse and all was well.


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Old 03-22-2019, 10:25 AM   #14
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The latching relay on my 06 Camelot had power supplied through a 5a fuse. Replaced the fuse and all was well.


Tom
This is something to investigate as well^^.


You found the 20 amp fuse to the pump, but the relay is an electrical switch that may have its own, lower amp fuse for power. When you find the latching relay, test the power input to the relay coil and see if you get 12v when the pump switches are depressed.
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