2021 Ram 3500 H.O.

4x4ord wrote:
We might be at the point where our trucks can tow more than they can safely stop. Big trucks use air brake systems which require air pressure to hold the brake shoes off the drums (or in some cases discs). When air pressure is lost buzzers sound and lights illuminate. If the pressure continues to drop a dump valve will dump the remaining pressure and the brakes will be applied by spring pressure locking all the wheels until the problem is rectified. I’m not aware of any such safety mechanism with electric brakes.

From what I have found out recently not all axles have that safety feature, only the ones with parking brakes. I know that my motorhome only has it on the rear axle.