Headlight circuit, sealed beam with drl for GMC Cab & Chassis C2500 (1989-2000)

BLK WIRE BULB CHECK DAYTIME RUNNING LAMP INDICATOR DAYTIME RUNNING LAMPS MODULE (BEHIND LEFT SIDE OF I/P) DAYTIME RUNNING LAMPS RELAY (ENGINE COMPARTMENT FRONT PLENUM PANEL) DK BLU WIRE GRN WIRE HEAD PARK HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HOT AT ALL TIMES HOT AT ALL TIMES DRL-FOG FUSE HOT IN RUN, BULB TEST OR START FUSE BLOCK GAUGES FUSE 4 INSTRUMENT CLUSTER LAMP FEED HI BEAM FEED HI BEAM INDICATOR LEFT HEADLAMP ASSEMBLY HI LT GRN WIRE LT GRN/BLK WIRE OFF OFF HEAD ORG/ WIRE OUTPUT TO RELAY GROUND PARK PARK BRAKE WARNING SWITCH (AT PARK BRAKE, UNDER LEFT SIDE OF I/P) PNK IGNITION 10 10 WIRE PNK WIRE RIGHT HEADLAMP ASSEMBLY HI LO TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE