On our rig we have a switch labelled "Safety Lights" which is the yellow marker lights under the slides and steps. Another is the ODS Flood Light, or scare light if you prefer.
I'm not sure how you would tell which switch goes to which heating pad/tank, but I guess it really doesn't matter. If you need one on, you need them all on. Black, gray and fresh unless you don't have any fresh water, I suppose.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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