Mystery Battery Draw While Parked UPDATE
Update 13 Jan-- ----------- Never know--somebody on here might have an idea what to look for, thanks for any help. 2003 Chev 2500HD LT (so has lots of electrical stuff that works with ignition...
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You need to open both doors and the hood fully for diagnostic access, then disable all the door/hood ajar switches so the vehicle thinks they’re closed. Then you need to disconnect the battery and put your ammeter in series. After that is all done, you need to walk away for an hour so everything times out, keeping in mind that if you open a door or a connection, you’re going to wake everything up again and your reading will no longer be accurate.
