1. SkwurlyFab

    Batteries drop to 11.9v overnight. How to find and fix the phantom power drain?

    I've been having a lot of trouble with a phantom power draw on my 04 Chevy 2500HD. I've got two XS Power D3400 batteries under the hood wired in parallel with a Mechman E-series 250a alternator powering them. My system consists of a Kenwood DNX-8120 HU feeding an Orion HCCA-D5000 sub amp, and a...