ignition

So basically I have a pioneer 5100nex model head unit in my 2001 Audi A6 and I’m trying to figure out if the head unit is messed up or if it’s something else. The instructions for installing the head unit say that it can NOT be installed in a vehicle without an ACC switch on the ignition and my...

I've been trying to find a true ignition source for my Install Bay IB500 500 amp relay/isolator in my 1997 Mustang coupe. I have a second battery and capacitor in the trunk that I want to separate from the battery under the hood when the engine is not running, this way if I leave my system...