2001 Ford Windstar Windstar has no 12v from switch to the s

Van would not start last week. This is what we have done so far. Battery was drained so new fully charged battery was put in. Alternator was replaced, old one was bad. Replaced the ignition switch and we took out the radio because I thought it may be contributing to the drained battery since CDs were stuck in the changer. (Wasn't sure if that had anything to do with current prob but am planning on replacing anyway, so went ahead and removed it). We replaced all the battery cables and clamps. There is no current from ignition switch to starter solenoid small terminal.