Review on WirthCo 30703 Battery Doctor Top Post Triple Tap Also Used As A Frame Ground by Paul Newton

This clips on the "fused” side of the circuit. To provide power for additional accessories, in my case, a tach, oil pressure, and water temp gauges.Install is simple: Take out fuse, test both sides of circuit with test light. The Side without power is the side that the fuse tap should be on. This means that if there is a short, the fuse will blow cutting power, protecting your car.