I adjust my brake shoe grab just like on my truck. I turn the adjust until the brake shoes just grab.
On mine each wheel makes a low tone noise when engaged. I can hear this real plain with my ears near the wheels.
When I first start out I will use my slider lever to stop both vehicle and trailer at a stop sign just to check out the brakes and get them warmed up somewhat.
My fifth wheel would lock up all four brakes pretty good on gravel roads using the slide lever on full with my then P2 brake controller...
Have never pulled the fifth wheel with my 2010 truck and built-in ford OEM brake controller. It slides the wheels on the off-road POPUP on gravel big time...
Roy ken
