Traction Control System Off Indicator
WARNING: This page is about a different car, the 2005 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.
When the traction control system is in the ON state, the traction control light emitting diode (LED) request from the electronic brake control module (EBCM) to the body control module (BCM) circuit 832 is at battery voltage. In response, the BCM grounds circuit 1660. This action turns ON the traction control LED, indicating to the driver the traction control system is able to react to slippery conditions.
When the traction control system is in the OFF state, the traction control LED request from the EBCM to the BCM, circuit 832, is switched to ground. In response, the BCM switches OFF the traction control LED indicating to the driver the traction control system has been disabled.