2 PCS JD1912 Car Relay Harness, 12V 40A 4 Pin Relay Sockets with 12&16 AWG Tinne
Just connect the four cables of different colors to the corresponding lines, respectively. The simple installation is completed within a few minutes and does not require professional skills. You can use them to drive devices such as headlights, fog lights, air conditioning compressors, and horns.