I assume this came with a relay? First take out the fuse. then From the Relay, Red wire to to Positive battery terminal. Black to Ground (bolt in body that other grounds are on). Then there is usually a wire coming out that would go to a switch (trigger wire) usually white, this needs to be spliced into the white with yellow stripe (if I remember correctly) on the fog light harness; I used a tap splice (super easy). Then connect your +/- wires to the fog lights. replace fuse. if it flickers or the relay makes a buzzing sound, you need a resistor (warning canceler) look up pulse width modulation PWM.