VSC Off (TRAC Off) Indicator Light, VSC Off (TRAC Off) Switch Circuit.: Wiring Diagram
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
For indicator light & switch circuit VSC/TRAC OFF wiring diagram, see Fig 1.
For complete ABS System Wiring Diagrams, see ANTI-LOCK BRAKES in SYSTEM WIRING DIAGRAMS article.