1998 Plymouth Voyager 98 Voyager ignition or clockspring

Electrical problem
1998 Plymouth Voyager 6 cyl Front Wheel Drive Automatic

ok! I need help. Ive been hav a problem with my 98 gr voyager 3.3l for awhile. It has weird symtoms. The check eng. Light comes on and the battery light comes on if it is cold outside, if I put the van in a warm garage for an hour and start it the battery light goes out and I can reset the mil the code p1478 battey temp out of range.I replaced the pcm after brought it to my local chrsler delearship and the said it was bad. They hooked up a scanner and couldnt communicated with it. Also my coolant temp gauge would fluccuate and my rad. Fans wont work. So today I was checking wires, grounds, etc, and I found that with the van running at idle if I turn the ingnion key foward just alittle bit. Not much. My coolant temp. Gauge will work and rad, fans will cycle on when needed and also I forgot to metion that the charging system was overchariging and that goes back to normal when the key is prssured forward. But then the abs and airbag light come on and I lose power to radio, turn signals, heater blower motor. So im thinking ignition swich? Or maybe clocksping? Not sure if those sound like any usual systoms but it definitly is affected when I turn the key forward a bit. Any help would be appeciated.I guess I could hav ground problems or a bcm, but like I said I already brought it to a dealership and it didnt get resolved?