Can someone help me as to where the blue wire does comming out of the relays goes to. Its a 16" troyer kit for the 97-03's Installed this once. Then tore the truck apart and cant remember where it goes

Red = 12v constant
Yellow = 12v key on
Black = Ground
Green = AC
Orange = + Fan
Blue = ??

 

You don't have a temperature sender/switch listed there...

 

Thats because they are grey wires and already connected

 

Then I suggest you check the Troyer website.