I'm trying to figure out why my hvac doors stopped working suddenly. On a trip over Christmas my 2005 LGT stopped venting heat to the defroster. I've since changed the mode actuator (the box that moves the arms up and down to direct the airflow) and the temp control module (elect box that controls the mode actuator). Both of these parts came from the same 100k mile parts car.
So, I'm trying to figure out why things aren't working. Is it because the mode actuator from the parts car is work out just like my original?
OR.... is there a wiring issue? When I pulled out the mode actuator, the connector wires weren't part of the wiring harness, they were 4 wires wrapped in electrical tape, that disappear behind the dash (between the firewall and the stereo). When I pulled the parts from the parts car, the mode actuator wiring was a 4" loom with a connector on each end.
I can't figure out why anyone would have messed with this wiring. The only thing I can think is that this was somehow affected when I took the car in for the air bag recall about 6 mos ago.
My question - any idea if the entire dash comes out for the airbag recall, and if there is any reason that this would affect my mode actuator wiring? I'm sure if I accuse the dealer of this, they will deny it, so I haven't even approached them.
Just wondering if I should spend another $75 on a new (not used) mode actuator, or tear apart the dash to follow that electrical tape wiring and see if something came loose (a project I'm not looking forward to).
Any suggestions greatly appreciated!