In the Systems category of the Documents section of this forum there is an Attwood [sic] Hot Water Service manual that has wiring schematics in it. It should help you identify the wires.
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2013 Silverado 2500HD LTZ CC 6.6L Duramax Diesel
2023 Rockwood 2445WS
Buster, miniature Dachshund
2024: 2 trips, 26 nights in 8 states, 4801 miles
2023: 9 trips, 48 nights in 12 states, 2 provinces, 8120 miles
2019: 7 trips, 43 nights in 6 states, 3904 miles
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