Test lights are used to check for voltage and continuity.
There are two types: self-powered and non self-powered (figure 6-7).
Self-Powered Test Light
The self-powered test light check for continuity. It consists of a light bulb, battery, and two leads (figure 6-8). If the leads are touched together, the bulb will light.
A self-powered test light is used only on an nonpowered circuit. Select two specific points along the circuit through which there should be continuity. Connect one lead of the test light to each point. If there is continuity, the test light circuit will be completed and the bulb will light.
Non Self-Powered Test Light
A non self-powered test light is used to check for voltage (figure 6-9). The tool is made of a 12-volt light but with a pair of leads attached. After grounding one lead, touch the other lead to various points along the circuit where voltage should be present. When the bulb goes ON, there is voltage at the point being present.
