[Jesse Mingus]

I have a 94 2500 that had a 454 in it. I got a 6.5 turbo diesel from an 89 and am currently swapping it. I took the wiring harness from the 89 and everything plugs in except for the heater control. Is there an adapter somewhere out there or a diagram I can use to splice my heater control into the older wiring harness?

 

[geo1]

Haynes repair manuals have a decent diagram,give it a shot

 

[jasons99hoe]

i would go with what geo said. look at wiring diagrams for both options and make connections to corresponding colors. seems legit