As the title says, '03 Ram 2500 Cummins Quad Cab

trying to disable the "horn while backing up with door open", I have an idea without disabling the horn or swapping doors, etc.

Anyone have a copy of the horn circuit wiring diagram?

 

if you go into the FAQ thread and go down to one of my posts, you'll see a link to a thread with very good internet wireing diagrams for our trucks.