Festus2 and Thesweetlife are absolutly correct.I had a 2004 Prowler with the same switches for the water heater,my 2013 alpine has a switch on the heater itself to go electric (I wish it had the double switches on the inside!)
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2013 ALPINE 3700 RE
2009 Dodge Ram Dually,6.7 Cummins,6 speed manual
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