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Old 06-07-2013, 03:10 PM   #15
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I believe the controller actually switches the ground rather than the hot, though I never understood why.

It will be located at the closest convenient point to where the wires from the various switches converge on their way to the pump. That is almost never near any of the actual switches. My technique has always been to start at the pump and work backwards, since odds are the controller is near the pump than any of the switches, but that's just my limited experience. With one switch in the galley and another one or two typically in the bath area, the closest point for the wires to converge is usually somewhere in between bath and the pump, which is often located not far below the bath area. But you have to evaluate based on the actual locations of switches and pump in each rig.

Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
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Old 06-07-2013, 08:43 PM   #16
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Join Date: Aug 2012
Location: Lake Lillian, Mn 56253
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Finally located the relay behind the furnace grill.

The wires from the pump and pump switch came up into the coach and then ran up the wall to the ceiling, one circuit went up and across and down to the bathroom switch, other circuit went up and forward and then down to the control panel on range hood and continued down to the relay on floor below the furnace. Most wires were hidden in walls and ceiling and could not be seen.

Thanks to all for the help.

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