Redarc Tow Pro Brake controller.

[GeeYou8]

A couple of times recently when braking on gravel/corrugated roads I've briefly locked the wheels of the Tvan & the Towpro has then recalibrated itself. Not really a problem, but don't know why it's done it.

Unit can't tell what surface it is baking on, I have turned the dial down a bit when not on sealed surface, also have to turn down to 1 or 2 when there is no car on the trailer & it is too light.
Graham