This is kind of a silly question, because I should know this, but most of my cars in the past have not had any electrical problems. Anyone should be able to answer this:
What is a good thing to use for a 12v power supply for testing stuff? This comes up on my BMW occasionally too when looking into diagnostic procedures. I have a battery charger with 3 amperage settings, but I'm thinking that's not what you use. Get a small 12v battery at wal-mart, or what?
