To use a fuse tap, follow these steps: 1. Identify the fuse you want to tap into: Locate the fuse box in your vehicle and identify the fuse you want to tap into. It is recommended to choose a fuse that corresponds to the electrical system or device you want to power. 2. Select the right fuse tap: Fuse taps come in different sizes and types, so choose the one that matches the fuse you selected. Fuse taps typically have two slots: one for the existing fuse and one for the new circuit. 3. Disconnect the negative battery cable: Before working with any electrical components, it is essential to disconnect the negative battery cable to avoid any electrical shock or short circuit. 4. Insert the fuse tap: Insert the existing fuse into one slot of the fuse tap and the new circuit fuse into the other slot. Ensure a secure and tight connection. 5. Connect the new circuit: Connect the positive wire of the new circuit to the exposed metal tab or terminal on the fuse tap. Use a crimping tool or solder the connection for a secure fit. 6. Ground the new circuit (if necessary): If the new circuit requires grounding, find a suitable grounding point in your vehicle's chassis and connect the negative wire of the new circuit to it. 7. Test the new circuit: Reconnect the negative battery cable and test the new circuit by turning on the device or electrical system you connected. Ensure it is functioning properly.