"No country can be called free which is governed by an absolute power;
and it matters not whether it be an absolute royal power or an absolute
legislative power, as the consequences will be the same to the people."
--Thomas Paine, Four Letters on Interesting Subjects, 1776
I have a 2003 7.3 with a 6 speed and when I bought the truck a few years ago it had the ebpv already set up as an exhaust brake. I'll have to take a look when I get home but I know there is a relay and a switch associated with it. It activates a couple seconds after I let off the accelerator pedal. I've towed almost 17000 lbs with it and it works awesome. Never had any issues with it at all.