On-Board Air System Schematic - York Compressor & ARB Air-Locker Wiring Diagram

This document is a color schematic diagram for an on-board air (OBA) system built around a York compressor, combined with ARB Air-Locker differential controls. It shows the plumbing and electrical layout: the York compressor draws through an air filter and feeds through a check valve to a manifold, which connects to a pressure switch, a pressure regulator set to 70 psi, an air tank equipped with a drain and a 150 psi safety valve, a pressure gauge, and quick-connect couplers at the front and rear of the vehicle. Two ARB solenoids supply air from the regulator to the front and rear ARB Air-Lockers. Electrically, power comes from the fuse box (ignition-on only) through a 20A in-line fuse to a lighted master switch, two lighted ARB switches (labeled F and R for front and rear), a compressor indicator lamp, and a gear-shift mounted switch. A reader can learn the overall component arrangement, air-line routing, pressure setpoints (70 psi regulator, 150 psi safety valve), fuse rating (20A), and how the switches, solenoids, and lockers interconnect in a typical DIY on-board air / air-locker installation.