Ok so yesterday, I had to jump start my chevy blazer because I left the dome light on and the battery went dead. once it started, I let it run at high rpms for 8-10 minutes to semi charge the battery before I left. I know it was charging, because my alternator guage was reading 16, and a fully charged system runs at 14. However I got 50-75 feet down the road and everything went dead and the car just shutoff driving 35mph down the road. So i went to walmart got a new battery and everythings good... but it got me thinking. Even if the battery was dead, the alternator should have been enough juice to keep the car running, I know this because I can remove the black terminal off of the battery (I didnt actually do this, but I know it works, because years ago it was routinely performed by mechanics as a test to verify if the alternator is bad or not. ) while the car is running and the car will stay running. This implies to me that I had some sort of problem with the red side of the battery or the connection to it. Which makes sence because the red connector was heavily corroded. So I must have lost ground contact which is why everything just shut off dead. So here are my questions... 1 Which side of the battery is the ground? + Red or - Black The negative side of the battery has all the electrons waiting to flow to the positive side of the battery(where the electron holes are)... why would you ground the negative side of the battery? 2 Am I therefore correct in believing that the frame of the car is not truely ground in this circuit its just serving as a gigantic piece of wire. Surely the e- are not flowing from + to - on a car battery when its exactly the opposite on every other battery known to man. 3 Why when jumping starting a car, do you connect good red to weak red, and strong black to engine block? Is this to provide a common ground for both batteries for the current to flow properly? 4 When connecting up a suped up stereo... once again, why do you connect it to only the red side of the battery and ground the black to the frame of the car? It seems that electrons are flowing from the negative side of the battery, into the engine block, through the spark plug, back through the wire into the distributer, into the spark coil and from there by wire back into the positive side of the battery... Can someone confirm this? I read this on an auto site... and I believe it is definately incorrect... I was always taught, electrons do not flow from the positive red side of the battery, they flow to it.