You definitely need to read and understand your owner’s manual.
The control I have has two adjustments, one controls the rate at which the power is sent to the brakes the other controls the amount of power sent to the brakes. They sort of work as course and fine tuning adjustments to keep the brakes from locking up with a slight touch of the pedal yet allow aggressive braking in a panic stop.
My controller was adjusted by the technician at my TT pick up time. He specifically said that I would need to re-adjust it once the TT was loaded with supplies.
Not all TT brakes will lock up and skid on dry pavement. I cannot lock up the brakes on my 25 ft. Dutchmen. It did however stop very nicely during a panic stop to miss some deer.
Again, read and understand the operation of you specific control instructions. Your dealer or the internet may be able to help.