The Truman Doctrine arose from a speech delivered by President Truman before a joint session of Congress on March 12, 1947.
Positive First. When installing a mower battery, always connect the positive cable first. The positive cable is red. It attaches to the battery terminal post marked with a plus sign, the letter P or the word POS. Attach the negative cable last. The negative cable is black.
If your lawn mower won't crank or the battery doesn't seem to hold a charge, perform a quick test with a digital multimeter before you decide to purchase a replacement. Lift the seat on your riding lawn mower to access the battery. Turn on the digital multimeter and switch it to DC or A to test battery voltage. Set the meter to a value of 13 V for a 12-V battery, which is one value higher than the expected reading.