dealer installed ipod kit and sat radio. w/ ipod on the volume is 50% as loud. if sat radio disconnected at back of radio,ipod op ok. sat radio will work ok w/ or w/o ipod harness connected. any thoughts......tried other methods of spicing wiring but can't get both to work.

realy stuck here.

receiver/tuner, or via the AUX input at the HU. The two signal sources should not be connected in parallel to the same terminals at the back of the HU.