Ford 5.0L Secondary Air (Thermactor) System Diagram - 1990 Bronco AIRB/AIRD

This document is a two-part line-drawing schematic of the Thermactor secondary air injection system on a Ford V8 engine (filed by the uploader as the 5.0L system for a 1990 Ford Bronco). The left illustration shows the components installed on the engine as viewed from the front: the Air Diverter (AIRD) valve mounted high on the engine, check valves, connecting hose, the Air Bypass (AIRB) valve, and the belt-driven air pump at the lower front of the engine. The right illustration is an exploded/routing view of the same system removed from the engine, labeling the crossover tube (highlighted with a red underline), two check valves, the AIRD valve, the AIRB valve, and the air pump, with an arrow indicating the front of the engine for orientation. A reader can learn the identity, relative location, and hose/tube routing order of each secondary air component: air flows from the air pump through the AIRB (bypass) valve, then to the AIRD (diverter) valve, through the check valves, and into the crossover tube feeding the exhaust. The document contains no text stating year, model, engine displacement, part numbers, or torque specifications, identification of components is by callout labels only.