On Monday, May 20, 2019 at 4:37:20 PM UTC-4, wrote:
As far as I can tell, every time that the tow vehicle uses its brakes, the brakes on the trailer engage. Is this not the way it is supposed to work?

DVM

No - only if the towing vehicle decelerates fast enough so that the trailer does overcome the force of the damper in the tow bar will the brakes be engaged. If you feel a subtle 'bump in the rear' every time you tap the brake, check/replace the damper.

Uli
'AS'