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smitty81503's avatar
smitty81503
Explorer
Apr 26, 2021

Duramax batteries drained by camper while plugged in.

I’ve had my GMC duramax parked for two days with my truck camper plugged in to the the house. I’ve been running the refrigerator in the camper . Now my two truck batteries only show about 10.4 volts ...
wnjj's avatar
wnjj
Explorer II
Apr 28, 2021
Sjm9911 wrote:
Why would he have the fridge on 12v when hes plugged in to the house?

Same reason the batteries are dead. The 120V or the converter clearly wasn't working. If not the fridge, there's really nothing else that should pull down multiple batteries in only a couple days.

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