Abstract: An apparatus for diagnosing automobile audio systems having a system integrity analyzer which includes speaker testing. The speaker testing includes a member for supplying an input to each of the positive and negative leads while supplying ground to the other of the positive and negative lead. This, in turn, facilitates diagnosis of the operation of the audio system of the vehicle. In addition, the apparatus comprises a system for analyzing vibrations comprising a frequency transmitter and an oscillator. The frequency transmitter is capable of transmitting a signal generated by the oscillator on a frequency that is receivable by a vehicle audio system. The oscillator includes altering the signal generated by the oscillator between the lower audible range and the upper audible range.