Interface Module (Outputs)

^ Circuit 46 (terminal B2): Right channel video audio (+) output to the rear speakers when the radio and the Rear Seat Audio (RSA) are off. The IM does not send this output to the rear speakers when either radio or the RSA is on.
^ Circuit 115 (terminal B1): Right channel video audio (-) output to the rear speakers when the radio and the Rear Seat Audio (RSA) are oft. The IM does not send this output to the rear speakers when either radio or the RSA is on.
^ Circuit 116 (terminal 83): Left channel video audio (-) output to the rear speakers via when the radio and the Rear Seat Audio (RSA) are off. The IM does not send this output to the rear speakers when either radio or the RSA is on.
^ Circuit 199 (terminal B4): Left channel video audio (+) output to the rear speakers when the radio and the Rear Seat Audio (RSA) are off. The IM does not send this output to the rear speakers when either radio or the RSA is on.
^ Circuit 1011 (terminal A5): High with the RSA is turned on. Used to signal the radio that the RSA is on. Then, the radio enables the RSA enabling circuit, and changes the speaker level output of its rear audio channels from speaker level to headphone level.