i pulled the dash to install a new evaporator core in my truck, everything came apart and went back together without a hitch, no wires left unattended. The only thing that didnt do like i thought it should was a sensor on the transmisson linkage that came loose from the metal conector, but it snapped back like it should. After i put the battery cables back on the horn did a constant blow and the switch does nothing now. the only thing the dash shows is the milage and it cuts off after you shut the door. the headlights work and the emergency flashers flash, but the switch doesnt turn anything on