Been over a year since I took the heater box and controls out of my truck. Anyone got a diagram of what cable or wire attaches to what switch on the heater control panel and what rod on the heater box?

 

There are 3 cables.

Longest should connect to the heater valve on the passenger side inner fender and connect to the TOP Temperature control lever (Low/Warm)

The other 2 connect to the BOTTOM control lever for Heat and Defrost. They connect to the Y shaped lever. The one on the right connects to the right flapper of the heater box and directs hot air down. The one on the left connects to the left flapper and directs hot air up.