I know this has been off the board for awhile,but i have that box also....ther is also a little grey 4 pronged switch next to,is that part of the a/c also.How much of that wiring can i "dispose of".It runs thru the firewall and into 2 connectors.Are they all a/c and can they be eliminated and how much under the dash can i get rid of....i am horrible at wiring schematics.I am trying to fix..repair..replace and clean up the wiring that the previous owners "modified"...thanks for the help....Joey