The open end of the black wire is connected to the cathode of the power supply (iron can also be used) Connect the red wire of the anode of the power supply (be sure to connect the fuse box, do not connect the battery directly to the anode) The yellow wire is connected to the original car horn wire, whether it is negative Corner, the blue and black lines on the other side; note: the LUE line and the black line are small Feature: 100% Brand new and high quality. Horn Socket Relay Harness for Cars and Motorcycle. Resistance to high temperature and high pressure line protection. To protect the original car line. Easy installation, needn't change the original car circuit can be applied directly.
Practicability and wide generality, any vehicle assembly directly. Note: Assembly before you find out the model of working voltage is 12v, This product can't install and use 24v voltage.