Horn circuit, commercial chassis for GMC Vandura P3500 (1985-1997)

1995 VFTC BLK WIRE DK GRN WIRE HORN RELAY HORN SWITCH HOT AT ALL TIMES HORN/DM FUSE I/P FUSE BLOCK LEFT HORN (LOW TONE A-NOTE) (BODY BUILDER INSTALLED) ORG/ WIRE RIGHT HORN STEERING WHEEL)