Positive, because the negative terminal is usually used as the ground plane.
Always the negative cable first.
Connect the positive + cable first and negative - last. When disconnecting them disconnect the negative - first and positive + last.
Disconnect the negative - terminal first, then the positive + terminal. Unfasten the battery hold down clamp. When reinstalling the terminal connections connect the positive terminal first.
Look for a + by the positive terminal and a - by the negative terminal, or red for positive, black for negative. Some batteries have the positive terminal protruding and the negative terminal flat. Or you can get a meter that will tell you which is which,
disconnect negative battery terminal depress brake petal fully for 30-45 seconds reconnect negative battery terminal
disconnect the negative battery terminal to reset the pcm computer. disconnect it for at least 20 minutes
Electrons have a negative charge. For that reason, electrons will always flow in the opposite direction of the current, which flows from positive to negative. Electrons will therefore move from a negative terminal to a positive terminal when we look at the load on a cell. Within the cell, the electrons will flow from the positive terminal to the negative terminal.
When charging a car battery, you should always disconnect the negative terminal first. This helps prevent any short circuits or sparks that could occur if the positive terminal is disconnected first while the battery is still connected to the car's electrical system. After charging, reconnect the positive terminal first before reconnecting the negative terminal.
Disconnect the negative battery terminal for about 10 minuets.
Energy flows from the negative terminal to the positive terminal of a battery.
This is fairly easy... however: DISCONNECT NEGATIVE TERMINAL FIRST!! # Make sure your car is off # Keep your oem head unit codes handy in case you need to reset it # Disconnect you're negative terminal (use a rubber coated socket wrench to loosen the screw holding it in, make sure you wrap it in a rag to avoid it touching any ground on your car, and tape it off or hold it somewhere) # Disconnect the positive terminal # Reconnect your positive terminal # Reconnect your negative terminal # Then secure your battery covers and start your car and you're done!!