If it is working correctly You should be able to come to a complete stop in the same distance as if there was no additional towed vehicle attached.
Go find a stretch of pavement such as an empty parking lot or a secondary road that has little or no traffic.Take along a couple of friends to help set up and measure the distance that it takes You to stop Your Motorhome from 20 mph. repeat this 2 or 3 times to get an average stopping distance.
Then repeat the process with the Towed vehicle attached and the braking system set as You normally have it.
If it is working correctly there should be No difference in stopping distance!
Now try it with the Braking system turned off!
Please try this and report the results to the forum.
