Daily pre-trip inspection categories that FMCSA § 392.7 and the CDL skills test require the driver to check include:

1. Only the lights
2. Service brakes (including trailer brake connections), parking brake, steering mechanism, lighting and reflectors, tires, horn, windshield wipers, mirrors, rear-vision mirrors, coupling devices, wheels and rims, and emergency equipment
3. Only fluid levels
4. Only the windshield