5-9-0 then power down will take the e-brake switch out completely if I'm understanding you correctly ?
No it won't. After you set 5-9 to 0 and cycle power, there is a switch or jumper, depending on the version, on the ADON board that needs to be put into the "set" position. Before you turn the unit back on do this.
At this point an ADON learn, 5-25-1 has to be ran. Certain parameters are not actually changed until this is done. After the learn, set the switch or jumper back to "run" and cycle power. NOW.....at this point there is no monitoring of the ebrake switch and you have no unintended movement protection so the process has to be reversed in order to be completely functional and safe.