The dodge a/c was cooling cool, but not cold as in my 3 silverado trucks. The old r-134a was removed and i was going to add new r-134a to the dodge, but the compressor won't come on to let the r-134 get in. i have tried checking the fuses, relays, accelerating the truck but no luck.I am not an a/c technician but i have retrofitted my older trucks a/c with succes, has somewone had this problem before.