Sorry to Intrupt trying to get the conrtols to work but if you do go back to the stock deck you can build your own crossover Im probiblay going to make my own in the next few weeks.
If i remember correctly you use capasitors to cut the top end out and Coils for the Highend Im wanting to build a small board that I can have 3-4 of each all differnt values allong with switches so i can tune it to sound like i want it.
I have a couple of pages saved that a scanned from a book at the library a while ago so if you cant them I can email them since i do not have any serverspace to save them any more.
93 Buick LeSabre (83K)
2000 Grandprix GT (63K mi Totaled at 76K on 8/25/6)
Green 1993 SE (No longer with us.)