July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

4WD Switch

This switch is mounted on transfer case of 4WD vehicles. When transfer case is in either 4-wheel drive position (high or low), 4WD indicator light on instrument cluster (combination meter) will be illuminated when ignition is on. EBCM uses this additional input for ABS control on 4WD vehicles.