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 9	The Trailer Service Brake Control System
Trailer Service Brake Control System Components		ABI-CE 9-1 Illustration
Double Check Valve / Stop Light Switch Function		ABI-CE 9-2 Illustration
Trailer Service Brake Control System Operation		ABI-CE 9-3 Narrated Animation
Trailer Brake Hand Valve (Spike) - Introduction, Warning		ABI-CE 9-4 Illustration
Trailer Brake Hand Valve (Spike) - Component Identification and Operation		ABI-CE 9-5 Narrated Animation