A process is applied to control the correct connection of at least one power driven user (28, 32, 36), e.g. on an implement 12, to various power outlets A - D, e.g. on a tractor (10). By means of this process each user (28, 32, 36) on the implement (12) is identified by a signal coming from a sensor (24a - 24d) and being unique for this user (28, 32, 36). Another signal is generated by a controller (22a - 22d) being indicative of the activated and intended controller (22a - 22d), like a controller for raising a pick-up. In a verification phase these signals are assigned to each other, which assignment is stored in a memory (38) valid until the users (28, 32, 36) are separated from the outlets A - D.
