The negative battery lead cable is to be connected to the negative lead terminal on the battery.
My negative battery cable on my 1987 BMW 325is is in the trunk.
Normally the black battery cable is negative.
current flows from the negative to the positive cable and back into the battery cells, recombining with the element depleted of electrons that are flowing out the negative cable. The process is not 100% efficient and the battery will eventually cease producing current.
Connect the Positive + battery cable to the positive + battery post first. Then connect the Negative - cable to the negative - battery post.
1. Remove negative battery cable 2. remove positive battery cable 3. remove battery 4. install new battery 5.attach positive cable 6.attach negative cable
Always disconnect the negative battery cable first even if you are changing the positive cable and reconnect the negative cable last. This is to prevent accidental shorts to ground.
Disconnect the negative cable first when disconnecting a car battery
There are typically two cables, one is usually red and the other black. The black cable attaches to the negative terminal on the battery and the red wire connects to the positive terminal on the battery. When removing the battery from the vehicle always remove the negative cable from the battery first. When installing the new battery always connect the negative cable to the battery last.
Red, positive + cable to Positive + battery terminal. Black, negative - cable to Negative - battery terminal.
Remove the old battery, disconnect the negative cable first and install the new battery connect the negative cable last.
The battery cable that is grounded, is connected to the body of the vehicle. Sometimes it is the negative cable & sometimes it is the positive. You need to check which cable is connected to the body of the vehicle.