One of the people who ride my bus to work has an 04 exploder with a strange problem. They recently had to replace the heat control in the HVAC. This of course requires pulling half the dash apart and unplugging the stereo. They got the job done, plugged it all back in and re-assembled the dash. Now the radio works but the cd player won't. So the question is, would unplugging the cd player without disconnecting the battery have triggered some kind of anti-theft system, causing it to not function? they are not wanting to have to replace the unit, cause you know that'll cost a fortune. Thanks!