A multimeter is an electronic measuring instrument that is used to gauge volts, amps, and resistance from an electrical source. The most common automotive application for a multimeter is to test the ...

Battery Terminal And Cable Test By performing a Voltage Drop test, we can inspect the cable condition and connection quality. Cables and connections should consume less than 0.5V.

Touch the red test lead to that connection and the meter should again read slightly more than 12 volts. You’ve just proved that voltage is flowing through that cable.

Switch the multimeter to measure resistance at its lowest setting, and test across the fuse. A reading of OL, or significantly higher than 20 ohms, suggests the fuse is blown.