Courtesy lamps circuit, base for GMC Rally G3500 (1985-1996)

BATTERY JUNCTION BLOCK BLK WIRE FRONT DOME LAMP FUSE BLOCK FUSIBLE LINK (20 GA-RUST) HORN/DM FUSE HOT AT ALL TIMES IN LINE UNDERHOOD LAMP FUSE LEFT DOOR JAMB SWITCH LIGHT SWITCH DOME SWITCH NCA WIRE ORG/ WIRE REAR DOME LAMP RED WIRE RIGHT DOOR JAMB SWITCH SIDE DOOR JAMB SWITCH UNDERHOOD LAMP WHT WIRE