Module 1	Introduction to Brake Systems
Module 2	Personal Safety Around Vehicles and Air Brake Systems
Module 3	Service Brake Chambers, Slack Adjusters and Foundation Brakes
Module 4	The Supply System
Module 5	The Service Brake System
Module 6	The Spring Brake System (Park / Emergency Brakes)
Module 7	Service and Spring Brake System Options and Design Variables
Module 8	The Tractor Protection and Trailer Supply System
Module 9	The Trailer Service Brake Control System
Module 10	Trailer Brake Systems
Module 11	Anti-lock Brake System (ABS) Basics
Module 12	Air Brake System Inspection, Maintenance and Testing

MODULE 8	The Tractor Protection and Trailer Supply System
Tractor Protection and Trailer Supply System – Introduction		ABI-CE 8-1 Illustration
Trailer Air Supply Circuit - Component Identification		ABI-CE 8-2 Illustration
Trailer Air Supply Valve - Basic Function		ABI-CE 8-3 Illustration
Combination Tractor Park and Trailer Air Supply Valves		ABI-CE 8-4 Illustration
Tractor Protection Valve		ABI-CE 8-5 Narrated Animation
Trailer Supply and Spring Brake System Operation (Tractor Section)		ABI-CE 8-6 Narrated Animation