California CDL Pre-Trip Inspection: Lights Test 2026

Lights are the cheapest thing on the truck to check and among the most common reasons a vehicle gets pulled out of line. This California CDL lights and signals inspection test for 2026 covers the full set: low and high beams, turn signals front and rear, four-way flashers, brake lights, clearance and marker lamps, identification lamps and the license plate light.

The CDL pre-trip lights and signals practice test also drills reflectors and reflective tape, lenses that are cracked or wrong-colored, dirt and road film that dims a working lamp, and the trailer electrical cord and its connection - because a perfectly good trailer light means nothing if the cord is chafed through. Knowing the correct procedure for checking lights in sequence saves time on the walk-around.

The California CDL Manual details what has to be present and working, and it lists the number of questions California DMV uses for pre-trip inspection material. Verify that count in the manual for 2026.

Keep going:

• California CDL Pre-Trip Inspection Practice Test
• California CDL Pre-Trip Inspection Practice Test 2
• California CDL Pre-Trip Inspection Test
• California CDL Practice Test
• California Air Brakes Practice Test
• California CDL Combination Practice Test
• California Hazmat Practice Test
• California Class A CDL Practice Test
• California CDL Practice Test

Every question traces back to the California CDL Manual - skim the right-of-way and signs chapters before your retake.