The air conditioning on my 2000 durango finally went kaput after 166,000 miles. I knew it was the evap. core since I could actually hear the leak. Couldn't see dumping another thousand bucks in the truck for a fix so I did the project myself. Took great care in replacing both heater core and evaporator core. The problem I have is that now everything is back together, the blower motor won't run. I also noticed the interior light won't turn on when the doors are opened and the electric door locks don't work. I can hear what sounds to be a relay clicking for the door locks when the truck reaches the speed where they lock automatically, but nothing happens. The sound of the relay seems to be coming near the glove box. I am stumped as to the best way to troubleshoot this. Where might the connection problem be. Everything seems to be reconnected correctly but is there one I missed maybe behind the dash? I don't want to rip the whole dash out again! Help...it's 95 degrees and I have no air.

 

Sounds like a ground.

 

yup ill second that, sounds like you missed putting a ground back on