Anyone ever use one of these? It is suppose to measures tongue weight, pin weight, payload, and gross combined weight in real-time with an OBD-II connector. I am curious on how accurate it is for a ...
I've found that you can weigh the payload, to see what sort of gear you are carrying in the bed.
Then go to the "tongue weight" screen. To do this, the app will set a "zero" weight for your truck, including the weight in the bed. This will give you a tongue weight reading.
You can follow the same procedure to get a tongue weight and WD setup weight.