Review on 🔍 Innova 3420 Smart Test Light/ Circuit Tester: An Optimized Solution for Efficient Searching by Bohyun Hansen

This test lamp has 3 colors: white, red and green. A white LED indicates that voltage is flowing through it and is useful for adding a small amount of light to the area under test. Red LED corresponds to (+), Green LED corresponds to (-). The brightness of the red LED indicates the voltage of the circuit under test. This test lamp is computer safe, a must for today's electrical systems. It has a built-in cigarette lighter plug with an internal fuse and an adapter to connect the tester directly to the battery. The normal test light only indicates the presence of a (+) signal, while this tester works as a logic probe to indicate a ground signal as well. It has a very good ergonomic grip and is recommended for anyone who works with automotive electrical systems.