2013 Honda Insight Base - No Navigation; 4 Speakers

Not sure if anyone else has experienced this issue before, but I've replaced my factory radio, and as a result, lost my after market cruise control. Everyone that I have talked to has said the radio has nothing to do with cruise control, yet the VSS runs through the factory radio.

I've been told that there may be computer damage, however, unlikely since the cruise control's fuse has never been blown -- essentially the cruise maintains power but won't engage.

I put the factory radio back in and the cruise control works fine.

Any assistance would be appreciated; I'm receiving the run-around and no one can explain the loss of the cruise control. Also, I'm looking for a diagram showing the factory wires and what they are (eg. rear (+); rear (-); etc.), so if anyone knows where I can find that, I would appreciate it.

Thanks!