Forum Discussion
Snowman9000
Jun 08, 2013Explorer
OnaQuest wrote:Snowman9000 wrote:Chris Bryant wrote:
Steps should always be powered by the chassis battery, never the house battery.
But their wiring diagram shows a battery disconnect switch, which to me suggests the house battery.
Is 9 mA much of a parasitic draw?
Does your unit have a chassis battery disconnect? Most Class As do, and that's what the diagram is trying to show.
Your step should be, and probably is, wired to the chassis battery.
9ma is insignificant, but there should be a switch that ensures the step stays out while you are camped. This should eliminate the draw. If NOT, then add a switch.
The draw you were measuring may have been the step light. It should go out soon after step operation or door closing.
Mine is definitely wired to the house battery.
My MH does not have a chassis battery disconnect.
The draw I measured was simply the controller's draw when the main step switch is off. It's sort of a standby mode, waiting to be turned on. In this mode, it can react to the ignition being switched on. So it will draw this 9 mA whenever the house battery is connected, even if the steps are switched off.
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