Black on one end, Brown on one side of switch. single wire on other side.
Follow link See item 16 on middle/right hand side of diagram:
http://www.pelicanparts.com/914/parts/Elec...lectric_73A.jpgSingle wire comes from door switches, brown is ground and black is power. Switch on light in one direction comes on when door is open the other is always on. Careful not to leave it on it can overheat the lens and melt it.