GMC Forward Control P3500 (1985-1999) A/c circuit

A/C COMPRESSOR A/C HIGH PRESSURE CUTOUT SWITCH (NEAR COMPRESSOR) A/C HIGH PRESSURE CUTOUT SWITCH (ON COMPRESSOR) A/C SIGNAL BLK WIRE BLOWER MOTOR BLOWER MOTOR RESISTOR (ENGINE COMPARTMENT, ON BLOWER HOUSING) BLOWER SWITCH BRN WIRE DEF BLEND DIODE DK BLU WIRE DK GRN WIRE FUSE BLOCK FUSIBLE LINK HEAT VENT B/L HIGH BLOWER RELAY (ON EVAPORATOR HOUSING) HOT AT ALL TIMES HOT IN RUN HTR A/C FUSE LO LO HI LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE OFF MAX NORM ORG/ WIRE POWERTRAIN CONTROL MODULE (BEHIND RIGHT KICK PANEL) PPL RED WIRE SELECTOR CONTROL TAN WIRE YEL WIRE