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Old 10-16-2019, 09:51 PM   #1
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Water pump isnít working, need advice to diagnose.

Hello all, any advice to help me diagnose my water pump problem would be greatly appreciated.

2016 Dutch Star 4312, when I hit any of the wall switches to turn the pump on nothing happens, pump will not kick on. While checking the 10 amp fuse in the half bath (it was good), I hit the wall button 1 more time and heard a ďclickĒ in the breaker panel cabinet. There are what appears to be 3 relays with green lights on them in there, and when I hit the button they make a clicking noise. I left the bathroom door open so I could hear the ďrelaysĒ, when I tried it in the master bath and in the kitchen I can hear them clicking as well.

Also tried the switch in the wet bay, pump wonít turn on, but outside I couldnít tell if the relays were clicking or not. The pump is a FloJet model# 03526144.

Not sure if this is related to this issue but seems like it might be.......last trip out while boon-docking while taking a shower the pump stoped working. At first I thought one of the kids was pranking me, but turns out the pump was shutting off on itís own. Happened on more than one occasion, I thought then it was because I had activated the pump in the wet bay and didnít turn it off down there.

My first thoughts are to buy a new pump and install it, if you all can think of anything else it might be please let me know. I sure would appreciate it!
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Old 10-16-2019, 10:07 PM   #2
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Grab the handy voltmeter and check for power to the pump.

You could run temporary 12v power from a battery directly to the pump with an inline fuse to see if it still works. My guess is it is shot and needs to be replaced.
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Old 10-16-2019, 11:22 PM   #3
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You more than likely have a bad "latching relay". Newmar uses an off brand that frequently goes bad. The relay is in the wet bay, usually behind the wet bay wall. Kneel down, facing the wet bay and look under the wall, up to your left on the front wall.

The latching relay is just a ground. Every time you push one of the water pump buttons, the system connects to ground and sends ground to the water pump.

There is a VERY simple way to test the latching relay. Take a piece of wire, connect it to the ground (black wire) on the water pump and connect the other end to the coach frame, like the wet bay door striker. If the pump comes on the latching relay is bad. This is also a good way to bypass the latching relay in an emergency.

Here is a link to the relay on Amazon....if yours is bad, I would buy a spare to keep in the coach. https://www.amazon.com/Intellitec-00...1285925&sr=8-5


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Old 10-17-2019, 10:05 AM   #4
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Quote:
Originally Posted by Dutch Star Don View Post
You more than likely have a bad "latching relay". Newmar uses an off brand that frequently goes bad. The relay is in the wet bay, usually behind the wet bay wall. Kneel down, facing the wet bay and look under the wall, up to your left on the front wall.

The latching relay is just a ground. Every time you push one of the water pump buttons, the system connects to ground and sends ground to the water pump.

There is a VERY simple way to test the latching relay. Take a piece of wire, connect it to the ground (black wire) on the water pump and connect the other end to the coach frame, like the wet bay door striker. If the pump comes on the latching relay is bad. This is also a good way to bypass the latching relay in an emergency.

Here is a link to the relay on Amazon....if yours is bad, I would buy a spare to keep in the coach. https://www.amazon.com/Intellitec-00...1285925&sr=8-5


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Thanks Don! Would this be it in my coach? If so, does it matter that the one you posted on Amazon doesnít have the lights?
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Old 10-17-2019, 10:37 AM   #5
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That is the latching relay that the arrow points to. I carry a spare as they are prone to fail at inopportune times and places. That being said, a couple months ago, my pump quit working and I just automatically figured it was the relay so without doing PD, I put in a replacement and nothing happened. Go out the meter and found it was the pump that had failed. I have the same pump as you and ordered one via Amazon for $55 and had it 2 days.
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Old 10-17-2019, 10:50 AM   #6
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Yes.....One of those wires goes to the pump as the ground. Follow the ground from the pump to latching relay, pull that wire off the relay, insert a wire into the female end and run the other end to ground. This will directly ground the pump. If the pump comes on, it's the latching relay, if not, check the pump.
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Old 10-17-2019, 11:52 AM   #7
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You guys are awesome, THANKS for the help!!
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