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Originally Posted by Greg84
Sigh.....and the house batteries are dead again. 
My Freightliner dealership recharged them. While the house battery disconnect is in the off position there is a parasitic draw of ~ 0.3 volts. |
Assume you mean .3 AMPS - not volts...
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Called my dealership....they said this was normal....not trusting the guy I spoke with I called Thor and they said this was NOT normal, there should be zero draw when the house battery rocker switch is in the off position. No surprise.
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Agree with Thor - not normal... My rig just came out of 3 months storage and batteries still alive. (Checked periodically - but never charged).
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Thor gave me gave me a strategy to find that problem. Go to the 12 volt panel and pull the fuses one-by-on, while monitoring the draw on the battery. I'll give that a shot.
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Worth a try - but I'm guessing something more obscure... The disconnect should clearly take all input power from the 12v fusebox - a single check of the voltage going into the fusebox will confirm.
More likely is some connection bypassing the fusebox (hopefully its own inline fuse...) 300ma (.3a) could be a single small light bulb... a string of LED lights... a smoke/carbon monoxide detector.
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As a side note I had the chassis battery disconnected during this time time. I wonder if there is a feed into the chassis from the house battery through the bi-dir relay?
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All things behaving normally - should not happen - but again simple to check for voltage on the chassis side when chassis battery is disconnected.
Always the option to add your own disconnect right at the batteries - which others have done.
Good luck hunting!
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