I think you are on the right path. First test the amp draw, then bed in the brakes, readjust, and test again. I would expect you to be able to lock them up on loose gravel.
You should be able to manually bed in the brakes by driving up to a set speed and then slowing down with just the trailer brakes. Maybe Dexter will give you a specific bed process that uses this approach.
boshog wrote:
I'm just concerned because to stop at a traffic light that decided to change, I need to stand on the truck's brakes to stop.
Do you have to stand on the brakes for all stops - or is this a very fast stop for a short light? Having to stand on the brakes for every stop does not seem right/safe.
If this is a new trailer, you might be able to get the dealer to inspect the brakes at no cost. There's also a chance that they may have been contaminated due to a bad seal or something....
I would think the dealer would go for a test ride in order to evaluate them. They may also use a different vehicle which may help eliminate your tow vehicle as part of the problem.