Home » Training » Trailer Glossary » ABS Indicator Lamp ABS Indicator Lamp An ABS Indicator Lamp shows the status of an anti-lock braking system (ABS). When the indicator lamp is illuminated (amber), ABS is disabled and the vehicle reverts to ordinary brake operation without the benefits of ABS braking. Click to share on Facebook (Opens in new window)Click to share on X (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)