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Old 09-02-2013, 10:46 AM   #1
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Join Date: Jul 2013
Location: Longmont
Posts: 18
help with water pump wiring

My coach has two switches for the water pump. I had a old control panel 1989 from larson. This was bad so i am replacing is with a tech-edge unit. My question has to with the water pump switch setup. The system had no controller in the circuit that we can find. Now it the same wires are connected to the new switch in the same positions the main kitchen switch will turn on the pump nd the led on the switch will light. The old switch had no led on the switch but had a led board with wires running to that board. But if the switch in the bath is off the switch in the kitchen will not energize the pump. The bath switch will not energize the pump unless the kitchen switch is on. So the kitchen switch must be on and the bath switch must be on to run the pump. I also have a purple wire at the pump switch area that has 12 volts only when the pump has 12 volts.

Any held will appreciated

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Old 09-02-2013, 09:04 PM   #2
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Coastal Campers
Freightliner Owners Club
Join Date: Aug 2013
Location: Port Saint Lucie, Florida
Posts: 13
This site should be able to help you, if you can't find it on the site you can contact them and ask. I would have to go at it with a multi meter much like I would a 120V 3 way circuit.

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Old 09-03-2013, 07:28 AM   #3
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Vintage RV Owners Club
Fleetwood Owners Club
Join Date: Sep 2011
Location: Grand Island, Ne.
Posts: 77
I was reading the below link and it mention some anomalies when changing over from Larson monitors to tech-edge monitors. You may want to contact their tech support for your answers.


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water, water pump, wiring

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