BAC Forum
General Boards => Technical Support => Topic started by: Rick Daniels on February 18, 2024, 04:43:54 PM
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In my 99' Marquis I have three switches in the coach that control the on/off for the water pump. One above dining table, one on bathroom vanity and one in the toilet room. The red light adjacent to the pump is always on. In order to turn it off I need to trip the breaker above the bed when hooked to city water or the pump runs whenever I turn a faucet on or laundry. My assumption is that one of the rocker switches at any one of the three locations is faulty. My plan is to replace each switch until the red light turns off. I cannot find an identical switch so I hope someone knows a source or precisely what switch to acquire. Thanks in advance. I assume all three switches are the same.
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Rick
As you probably know there's a fourth switch in the plumbing Bay below the city water connection.
Beaver Coach Sales is probably your best source for these switches.
Bruce
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Rick,
Are the switches that turn the pump on or off "momentary" up for ON and down for off?
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On my 2002 Marquis the switch in the water bay is not momentary but an on-off-on type. The other three are momentary.
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Rick
If your coach is set up as David described your wet bay switch may have been left in the on position.
If not the problem could be with the system that controls the pump it may have a relay system or a intellatech pump controller which should be mounted in the pump cabinet.
I think Fred has some nice pics and explanation of the relay setup in one of his prior posts.
As for the switches they should be easy enough to check with a meter
If you need switch's take a picture of one and post it we may be able to identify a supplier for you.
This post may shed some light on the relay setup.
https://beaveramb.org/forum/index.php/topic,11631.msg78095.html#msg78095
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Eric,
Thanks for sharing the previous post from a couple of years ago! Beaver's version of Intellitec multiplex water pump controller is easy to mis-understand. If Rick will follow the logic of the diagram, he will find the issue. If someone replaced the switch in the water bay with an "on-off" switch and left it on, then the water pump cannot be turned off. Enclosed is a picture showing where the water pump relays are located.
Here is the sequence of operation:
1- Both relays are "off".
2- The "run relay" gets its "ground" from the "latch relay" (87A)
3- Pushing "up" on the momentary switch activates the "run relay"
4- The water pump is now on or in standby ready to come on
5- Pushing down on the momentary switch disconnects the "ground" from the "latch" relay
6- The run relay now loses its "ground connection" and shuts off.
7- When you let go of the momentary switch and ground is restored on the latch relay
8- You are back to step 1