A cochlear implant system comprising: a cochlear electrode comprising a plurality of contact electrodes; a stimulator in electrical communication with the cochlear electrode, the stimulator including a plurality of source elements, each of the plurality of source elements being in electrical communication with a corresponding one of the plurality of contact electrodes of the cochlear electrode; an input source configured to receive a stimulus signal and generate an input signal based on the received stimulus signal; a signal processor in communication with the stimulator and the input source, the signal processor being programmed with a transfer function and being configured to receive the input signal from the input source and output a stimulation signal to the stimulator based on the received input signal and the transfer function; a testing circuit (720, 722); a switching network configured to selectively place each of the plurality of source elements into electrical communication with the testing circuit (720, 722); and a controller in communication with the stimulator, the testing circuit (720, 722), and the switching network and configured to: control the switching network to place one of the plurality of source elements into communication with the testing circuit (720, 722); and (a) cause the stimulator to emit an electrical current from the one of the plurality of source elements in communication with the testing circuit (720, 722); (b) determine an amount of electrical current emitted from the one of the plurality of source elements via the testing circuit (720, 722); and (c) adjust the output of the one of the plurality of source elements based on the determined amount of electrical current. a cochlear electrode comprising a plurality of contact electrodes; a stimulator in electrical communication with the cochlear electrode, the stimulator including a plurality of source elements, each of the plurality of source elements being in electrical communication with a corresponding one of the plurality of contact electrodes of the cochlear electrode; an input source configured to receive a stimulus signal and generate an input signal based on the received stimulus signal; a signal processor in communication with the stimulator and the input source, the signal processor being programmed with a transfer function and being configured to receive the input signal from the input source and output a stimulation signal to the stimulator based on the received input signal and the transfer function; a testing circuit (720, 722); a switching network configured to selectively place each of the plurality of source elements into electrical communication with the testing circuit (720, 722); and a controller in communication with the stimulator, the testing circuit (720, 722), and the switching network and configured to: control the switching network to place one of the plurality of source elements into communication with the testing circuit (720, 722); and (a) cause the stimulator to emit an electrical current from the one of the plurality of source elements in communication with the testing circuit (720, 722); (b) determine an amount of electrical current emitted from the one of the plurality of source elements via the testing circuit (720, 722); and (c) adjust the output of the one of the plurality of source elements based on the determined amount of electrical current. (a) cause the stimulator to emit an electrical current from the one of the plurality of source elements in communication with the testing circuit (720, 722); (b) determine an amount of electrical current emitted from the one of the plurality of source elements via the testing circuit (720, 722); and (c) adjust the output of the one of the plurality of source elements based on the determined amount of electrical current.