Originally Posted by _fng_
At the batteries, I have nothing other than the engine power, engine ground, and sub amp power/ground. Should I do something with the ignition switch wiring? Side note, I rewired PP power to ignition switch to help with voltage drop from PP.
The only cables connected directly to the battery B+ posts are the cables going to the #1b and #2b posts and the auto bilge.
Nothing needs to be done to the key switch when installing the add-a-battery