Steve,
Some dash radio/DVD systems may have a selectable power source to use either coach or chassis batteries. Mine has a rocker switch on the dash which actually has 3 positions: chassis, coach,and off.
Only once, recently, did I forget to place this switch in the off position. Sure enough one month later was the first time I had discharged batts.
Marty
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2003 34' Dolphin 5342, W22, UP, UPGBrake, F and R Track Bars, Rear IPD sway bar, Koni FSDs, Safe-T-Plus, Scan Gauge II.. 2004 Jeep Liberty, Blue-Ox Adventa..
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