Have a Sirius satillite radio unit that works real good in everything EXCEPT my 95' 2188 combine. It has a factory digital tuned radio and it works good by itself but plug in the Sirius and all you get is static with some faint music in the back ground. Tried moving the unit in the cab to a different location.....also moved the antenna but nothing makes a difference. Did note yesterday that if I have the key in the "accesory" position that the stactic goes away and it works like normal. Don't get alot of harvesting done with it in this position so am looking for any ideas what might be causeing the problem. I was thinking maybe all of the electronics in the "A-Post" might be the culprit but by moving both the antenna and unit away from that area, it has made no difference. Any ideas?