Well I been towing trailers with my truck sense it was new. I have a Draw-Tite's Activator II electronic brake control. It works but the heavier the trailer the worst it stops. To much braking at slow speeds so you turn it down and then it didn't stop at high speeds. I have a friend that got the new jordan Brake controller. I toke a look at it. It got me thinking. So I went to work and this is what I came up with. I had alot of the part that I used and spent $7. 00 on the rest. The deferents is no comparison. It works so good. I wish I have done it a long time ago.