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Old 05-20-2020, 01:44 PM   #1
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Location of water pump latching relay?

Can someone tell me if my 2005 Monaco Knight 40PLQ has a latching relay and if so where might I find it? I have power to the fuse and to the lights in the 2 switches but pump no workie.
I have accessed all over the wetbay and even to the port side frame rail behind the cursed white plastic panel with no joy.
I'm not the best at electrical troubleshooting ( in fact I suck at it) but I can't find power on the pump connections.
Can anyone help please?
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Old 05-20-2020, 01:52 PM   #2
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Not familiar with your coach but mine is in the compartment with the pump within a foot of the pump.

Tim
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Old 05-20-2020, 05:03 PM   #3
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Find the power wire going to the pump and trace backward. It may go to a relay, you'll have to trace the trigger wire back to the latching relay.
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Old 05-20-2020, 05:49 PM   #4
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If you have 2 or more switches to turn the pump on/off you have a latching relay which is usually located close to the pump.
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Old 05-20-2020, 06:01 PM   #5
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Mine was in the wet bay, looking up to the right, removed acess cover, bracket on the right wall.
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Old Yesterday, 05:00 PM   #6
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I have looked everywhere you folks suggested with no joy. Unfortunately, I don't seem to have a similar coach to y'all. The PO of my coach has made some changes to the plumbing in the wet bay but none that I can see to the wiring.
The only two water pump switches, which are pictured below, one on the hall EMS panel and the other in the water bay are NOT momentary ON switches. Does this mean my coach does not have a latching relay but is wired like the two switches at the top and bottom of a basement staircase in a S&B?
The light next to the switch in the water bay used to light up with the switch in the ON position like the one on the EMS still does but I noticed it doesn't now. I don't know if the light burned out or if it indicates no power is getting to and/or through the switch in the ON position. I guess the next step I can think to do is pry the light and the switch out of the panel and test them.
Any other ideas or suggestions?Click image for larger version

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Old Yesterday, 05:33 PM   #7
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Hi FL420; I am in the same boat as Timaz as our latching relay is right in the same bay as the water pump itself. In fact it is less that 1 foot away from the pump! This might help. On my 2001 Monaco Windsor the latching relay is in the bay where the pump is located. I have 3 water pump switches. One on the panel like the first picture you posted. Second switch is by the bathroom sink & a third in the wet bay like one of the last pictures you posted. On my previous 2000 Monaco Windsor the water pump latching relay was not in the same bay as the water pump! I had the same 3 water pump switches in the 2000 Windsor. On the 2000 Model the latching relay was located behind the monitor panel, not in the same bay as the water pump like on my 2001 Windsor. Owners of Windsor's of 2000 and previous have found the latching relay behind the monitor panel. You might try looking behind that panel and see if it is located there. It's worth a shot, just some screws to take out. If you go back there let us know if you find it. Good luck! P.S. The little red indicator light can burn out. RV parts places have then and they are on the web! Also not sure how much difference this makes, but all my pump switches are momentary.
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