A/C Heater Control Replacement

On one of my recent junkyard runs, I pulled a pair some parts from a 1991 Dodge Daytona. One of the pieces that I pulled was the A/C Heater control. Looking at the vacuum hookup on the back, it looked like it would connect right up to the Aspen, so I snagged it to see if it would work. Here's the piece on my workbench.



Here's the backside of the unit, with the wires unbundled and stripped.



After consulting the wiring diagrams for both the Aspen and a Daytona, and some good ol' fashion jumpering wires, this is how far I was able to get it to work.

The Aspen has 4 fan speed settings (Low, Med-Lo, Med-Hi, and High) and the Daytona has 5 fan speed settings (Off, Low, Med-Lo, Med-Hi, and High). I was able to get 4 of them working, sort of. When the unit was set to Off, the fan would be on Low. Set to Low, the fan would be on Med-Lo, on Med-Lo, the fan would be on Med-Hi. When it was set on Med-Hi, I got nothing. When it was on High, the fan blew High. For the most part, I could live with that.

The vacuum workings was another story. The vacuum port did hook up just like I thought, but it didn't work with the right settings. When the floor button was pushed, the air came through the dash vents. When bi-level was pushed, it came through the defroster vents. When the defroster button was pushed, air came out of the floor vents. That part I couldn't live with, so I put that project on hold and installed the unit from the Town & Country.