Got done putting in a new heater core, along with other coolant system items, and now I have no radio, or hvac function. The factory radio works OK, the defrost button works, and the backlights work on the hvac panel. The vent control works fine EXCEPT the compressor doesn't turn on in the recycle or defrost modes. Anyone got some ideas I can try? Now, I tried to start the engine before I hooked the instrument cluster back up (check for leaks/fill the system while I put the interior back together). The engine died as though the theft system cut in. I plugged the cluster back in and it fired right up. Might I have done something wrong? Finally, ALL fuses have been checked, and they are all whole and unbroken.

Damn, never mind folks. PCM decided, or radio tripped somehow, to work. Also, found a connection not made to the hvac panel. Fraggin' thin got hung up in the wire bundle; shook loose and dangled when I wrestled the bundle further up in the dash.