I have a power acoustik DVD player double din multimedia player, model # DVD2-654 what does the IR Blue Wire connect to

SOURCE: parking brake switch wire on a power acoustik double din

this use to be simple for most units and yes it would work, however, manufactures became wise to this idea and placed a relay inside the unit that must be reset to prevent us WISEGUYS from doing so, but i do not know if this is the case with yours, if it is then you can run a toggle switch between the unit and the ground in order to reset this relay as needed with a flip of the switch