Vacuum Harness HVAC: Description and Operation

Engine vacuum systems a pre-assembled harness which features colored nylon vacuum lines. The color is a visual aid both in production and in service. The emission decal on the engine provides a colored schematic of the vacuum hookup which corresponds with the pre-assembled harness. Vacuum hose harnesses consist of nylon hoses a .150 inch outer diameter and a .090 inch inner diameter bonded to nylon or rubber connectors. Occasionally a rubber hose may be connected to the harness. The nylon connectors have rubber inserts to provide a seal between the nylon connector and the component connection.