One harness included. If you're wiring a pair of lights, order two.
Warning: Your truck will need to have the existing OE fog light circuit installed for this harness to work. The factory foglight wiring has a 10amp fuse in the fuse panel, you will need to make sure your LED lightbar draws less than 10 amps. A typical 20" LED light bar draws around 6-7 amps, and single LED pods are much less.