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Parasitic draw reading 2016 XLT after 1/2 hour


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Did you have 'approach lights'  on?  Myself, I've got the BCM set for "Dark Mode" and interior lights on 'Off'  , not 'Auto'.  Also permanently wired in "battery maintainer" solar panel [doesn't do anything when car is in shade but helps to reduce parasitic draw often enough].

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  • 3 weeks later...

All computerized cars use a small amount of electricity to keep their memories alive. The general rule for parasitic draw is 50 milliamps or less. 46ma is within normal tolerances. It shouldn't be an issue unless the vehicle sits for a long time without being driven, usually 14 days or more. It will eventually draw the battery down until it won't start. If you're in that situation, a Battery Tender or other automatic battery charger/maintainer would be recommended to prevent battery discharge.

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