The Evenbrake has a 'test' button which must be used every time you hook up, as it actuates the brake pedal 3X in an effort to bleed off the power brake boost which the car uses when running.
When the car isn't running, the brakes must be pumped down to bleed off the power boost, as the Even brake is designed to work without any boost in the car brakes.
I recommend cycling the Even Brake 'Test' button 2X to bleed off. Otherwise, if you don't, the brakes will lock up the first time you use them.
Mine broke and it's now in the junk pile, replaced by an Air Force One which works flawlessly.
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX