A buddy at work has an 04 didge dually 1 ton 4x4 and his triple dog downloader throws a code that his relay fan is out or going out Could anyone tell me what a relay fan is or does?
I know what a relay is and i know what a fan is just not the 2 combined.

 

mine does the same thing but nothing is wrong with it bullydog told me it was a random error code hope that helps