Normal Operation and Fault Conditions
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2018 Lincoln MKZ, 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, and 2018 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.
When the driver presses the traction control switch, a ground signal is sent to the ABS module. When the ABS module receives the ground signal it provides a ground for the traction control switch LED indicator.