Abs Telltale

When ignition is switched On, the ABS control module performs a self-diagnostic routine while the I/P cluster performs a bulb-check by illuminating the ABS telltale for approximately 3 seconds. If the ABS control module detects a malfunction, it will ground circuit 867 to the BCM. The BCM will then use circuit 1807 (Class II Serial Data) to command the I/P cluster to keep the ABS telltale On. The telltale will remain On until the ignition is switched Off.