In Texas, this is what the statute says as far as
what is to be inspected:
Quote:
Items of Inspection
05.06 Inspect All Trailers, Semitrailers, Pole Trailers, or Mobile Homes Exceeding 4,500 Pounds Actual Gross Weight or Registered Weight For: (Listed in suggested order of inspection) Refer to Federal Motor Carrier Safety Regulations, if required.
* Check for evidence of Financial Responsibility on towing vehicle
1. Brakes (system) (If gross weight exceeds 4,500 pounds)
2. Tires
3. Wheel Assembly
4. Safety Guards or Flaps (if four tires or more on rearmost axle) Pole trailers exempt.
5. Tail Lamps (2)
6. Stop Lamps (2)
7. License Plate Lamp (1)
8. Rear Red Reflectors (2)
9. Turn Signal Lamps
10. Clearance Lamps
11. Side Marker Lamps
12. Side Reflectors
13. Side Marker Lamps and Reflectors (30 feet or more in overall length)
(Refer to Reference Section as per lighting diagrams and as applicable to the particular trailer being inspected.)
14. Serial or Vehicle Identification Number
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A separate manual is provided to the Inspection stations with the instructions as to
how the inspection is to be done and what is required to pass. I used to have that manual years ago but haven't seen one in a long time, and I know a number of things have changed.