'Equipment Violations' are the trick here. They write you for a light out and cite you into Court. If you get the repair done, you can have an officer inspect it and the citation will be discarded. Not sure if there are any fees.
Some Deputies and Troopers have another trick up their sleeves though. They'll observe a vehicle they want to search looking for minor things like a bad license plate light. Once they make the stop, they'll waffletalk their way into 'consent' from the driver even if the driver isn't sure they agreed to it. Next thing they hear is the click of the cuffs. The officer already knows what's in the vehicle before the stop, they just don't want to bother with getting a search warrant.
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I did a bad one yesterday though. 4'x 8' HF type utility trailer loaded with some 2x6x14s, some other boards and 6 sheets of 13'6" metal roof panels. I don't think it was over weight, but with nearly 6' of metal hanging off the back, the COG was definitely behind the axle. When they slid it off the HiLo, the hitch jumped up enough to lift the back of the car. Strapped it all down and went on my way. Made it home fine.