Horn circuit, cutaway chassis for GMC Forward Control P3500 (1985-1999)

1995 VFTC A-NOTE HORN (ON LEFT RADIATOR SUPPORT) BLK WIRE DK GRN WIRE F-NOTE HORN (ON LEFT RADIATOR SUPPORT) FUSE BLOCK HORN RELAY (IN CONVENIENCE CENTER) HORN SWITCH HOT AT ALL TIMES HORN/DM FUSE ORG/ WIRE TURN SIGNAL SWITCH