Switched hot wire

[tmihalic]

Where can I find a switched HOT wire under the hood on a 2001 Dodge Ram 2500 Diesel? I need it for a relay for always on headlights.

 

[HighTechRedneck]

The one that I'm using isn't under the hood, but would work for a relay trigger. Tap into the radio circuit in the cab and run it out under the hood.