Forgot to ask. Which wire was loose... the red, yellow or black? I believe the premier series has a heavy guage ground that needs to be attached directly to chasis steel. The resistance on the factory radio harness ground is high. If it was the red or yellow, check if there are fuses in the pioneer harness and than check fuse directly below where the harness plugs into the stereo. Also when you say the clock is out...do you mean the vehicle clock or the stereo clock?

If the wire that was loose wasnt red, yellow or black.....we have a whole seperate issue.