12 volt system - Okanagan UDB

Boatycall wrote:
Well, first, welcome.

We need to know what kind of truck you have. Guessing from your screen name, a Chevy. FYI, if you could, fill out your Signature in "preferences". But regardless, the 12v accessory pin is NOT supposed to be energized when the truck is off. There may be something mis-wired in your 7-pin.

And yes, at 11v, you either have one very low on water, or you need a new battery. I (like many others here) would recommend 2 golf cart batteries rather than RV Deep Cycle.

My truck truck is a 2012 GMC 3500.

This video suggests the 7 pin is energized with the truck off...but perhaps he has the key in the on position.
https://www.youtube.com/watch?v=Xb-X5uAwht0

I do have a multi-meter so I will take some measurements and report back.

Thanks.