for USDM civic, the keyhole light wires need to be tapto this 2 wires, at interior fuse box, choose blue connector, and the wires are blue/light blue and pink.
tapped, if doesn't work, swap the wires and try again.
reference :
Interior lights & Mugen Replica Visors
http://www.8thcivic.com/forums/3214720-post98.html
http://www.8thcivic.com/forums/3243535-post99.html
http://www.8thcivic.com/forums/179062-post9.html
DIY: Courtesy Lights to Dome Light w/PICS