Before heading out on the highway, it’s good to know what’s going on under the hood… of any vehicle. If you’re driving a commercial vehicle, then it’s even more important. That’s why most states require drivers to a pass pre-trip inspection test before they can obtain their commercial drivers license (CDL).

Knowing how to conduct your own pre-trip inspection will ensure a safer, quicker drive on any job. That means less time spent broke-down on the side of the road (or worse), and more time behind the wheel making money.

What is a Pre-Trip Inspection Test?

A pre-trip inspection test provides the state with evidence that you can ensure your vehicle is safe to drive. It also provides you with confidence and peace of mind knowing that your truck is in good shape before hitting the road.

In the test, you will demonstrate your knowledge by walking around the vehicle, checking all the safety components and explaining each part that is checked to the test administrator. You should touch each part of the vehicle as you explain to show the administrator exactly what you are referring to.

Let’s Cover the Basics

In the exam, you must demonstrate a thorough knowledge of your vehicle. These are most of the basics you will be expected to check:

• Overall safety of the vehicle
• All major vehicle hoses – the hoses themselves, plus a quick check for puddles or dripping fluids underneath the vehicle that could indicate a leak
• All major fluid levels, such as oil, power steering fluid, etc.
• All major vehicle belts, including the power steering belt, water pump belt, alternator belt, and air compressor belt – ensure belts are snug and don’t have any cracks, frays or damage
• Clutch or gearshift
• Ensure the oil pressure gauge functions properly
• Confirm that all mirrors and windshields are clean, undamaged, and unobstructed
• For non-power steering vehicles, ensure the steering play is within the normal range.
• Double check that emergency equipment is on board – this includes spare electrical fuses, at least three reflective triangles, and a properly charged and rated fire extinguisher at all times

The list of safety checks can be quite extensive, but it’s essential that you commit all these basics to memory. That way you will ace your exam, keep your vehicle in good working condition and be able to prevent problems down the road.