How To Tell Which Battery Terminal Is Positive. Determining which battery terminal is positive and which is negative is a relatively straightforward affair. Ground cable only goes to one side but some cars that is on the negative terminal.
- plus sign - red wire if accompanied by black - brown wire if accompanied by blue - white stripe on a black wire if the other wire is plain black. This symbol mostly printed on the upper case of the battery. Testing polarity of a battery for black and decker drill 14 4 volt My leads were connected to my multimeter in reverse.
Fit the red positive battery terminal Step 7.
Plug the red lead into the port labeled with the volt symbol which is V Look at the reading to see if its a positive or negative number. Typically they are marked with or - somewhere. This is the negative battery post. Above its cap is a sign that shows - negative.
