AIR CONDITIONING – GMC Forward Control P3500 1997 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

4.3L

4.3L (VIN W), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997

List of elements for 4.3L (VIN W), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997:

• (engine harn, 23 cm from breakout to maf sensor)
• (engine harness, near bulkhead grommet)
• (engine harness, near maf sensor)
• (provisions for body builder hvac system)
• A/c compressor clutch
• A/c compressor clutch relay (engine bulkhead relay bracket)
• A/c compressor high pressure cutoff switch (rear of compressor)
• A/c compressor refrigerant pressure switch (a/c accumulator)
• A/c compressor refrigerant pressure switch (rear of compressor)
• A/c enable
• A/c ground
• A/c request
• Diode
• Eng-bat fuse 15a
• G112 (rear of left cylinder head)
• G200 (left interior bulkhead)
• Gauges fuse 20a
• Hot at all times
• Hot in run or start
• I/p fuse box
• Pnk
• R100 (engine harness, 30 cm from break-out to maf
• S110
• S125 (engine harness, 13 cm from a/c high pressure switch breakout)
• S132 (engine harness, near maf sensor)
• S142
• S143
• S144 (engine harness, near bulkhead grommet)
• Sensor)
• Vehicle control module (left radiator support)

5.7L

5.7L (VIN R), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997

List of elements for 5.7L (VIN R), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997:

• (engine harn, 23 cm from breakout to maf sensor)
• (engine harness, near bulkhead grommet)
• (engine harness, near maf sensor)
• (provisions for body builder hvac system)
• A/c compressor clutch
• A/c compressor clutch relay (engine bulkhead relay bracket)
• A/c compressor high pressure cutoff switch (rear of compressor)
• A/c compressor refrigerant pressure switch (a/c accumulator)
• A/c compressor refrigerant pressure switch (rear of compressor)
• A/c enable
• A/c ground
• A/c request
• Diode
• Eng-bat fuse 15a
• G112 (rear of left cylinder head)
• G200 (left interior bulkhead)
• Gauges fuse 20a
• Hot at all times
• Hot in run or start
• I/p fuse box
• Pnk
• R100 (engine harness, 30 cm from break-out to maf
• S110
• S125 (engine harness, 13 cm from a/c high pressure switch breakout)
• S132 (engine harness, near maf sensor)
• S142
• S143
• S144 (engine harness, near bulkhead grommet)
• Sensor)
• Vehicle control module (left radiator support)

6.5L

6.5L (VIN F), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997

List of elements for 6.5L (VIN F), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997:

• (body builder installed)
• (engine harn, 20 cm from cruise control module)
• (provisions for body builder hvac system)
• A/c compressor clutch
• A/c compressor clutch relay (right side of driver's island)
• A/c compressor high pressure cutoff switch (in high pressure line)
• A/c compressor refrigerant pressure switch (rear of compressor)
• A/c enable
• A/c request
• Diode
• Eng-bat fuse 15a
• G206 (below driver's island)
• Gauges fuse 20a
• Hot at all times
• Hot in run or start
• I/p fuse box
• Pnk
• Powertrain control module (left side of driver's island)
• R100 (engine harness, 30 cm from break-out to maf
• S115 (engine harness, near bulkhead grommet)
• S122 (engine harness, 15 cm from a/c compressor
• S123 (engine harness, 15 cm from a/c compressor clutch)
• S126
• S140
• S141 (i/p harness, near bulkhead grommet)
• S203 (i/p harness, near bulkhead grommet)
• Sensor)

6.5L (VIN Y), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997

List of elements for 6.5L (VIN Y), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997:

• (engine harness, 4 cm from electronic brake control module)
• (provisions for body builder hvac system)
• A/c compressor clutch
• A/c compressor clutch relay (engine bulkhead relay bracket)
• A/c compressor high pressure cutoff switch (rear of compressor)
• A/c compressor refrigerant pressure switch (rear of compressor)
• Diode
• Eng-bat fuse 15a
• G200 (left interior bulkhead)
• Hot at all times
• I/p fuse box
• S110
• S125 (engine harness, 13 cm from a/c high pressure switch breakout)
• S144 (engine harness, near bulkhead grommet)

7.4L

7.4L (VIN J), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997

List of elements for 7.4L (VIN J), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997:

• (body builder installed)
• (engine harn, 20 cm from cruise control module)
• (provisions for body builder hvac system)
• A/c compressor clutch
• A/c compressor clutch relay (right side of driver's island)
• A/c compressor high pressure cutoff switch (rear of compressor)
• A/c compressor refrigerant pressure switch (a/c accumulator)
• A/c enable
• A/c ground
• A/c request
• Diode
• Eng-bat fuse 15a
• G206 (below driver's island)
• Gauges fuse 20a
• Hot at all times
• Hot in run or start
• I/p fuse box
• Pnk
• R100 (engine harness, 30 cm from break-out to maf
• S115 (engine harness, near bulkhead grommet)
• S122 (engine harness, 15 cm from a/c compressor
• S123 (engine harness, 15 cm from a/c compressor clutch)
• S126
• S140
• S141 (i/p harness, near bulkhead grommet)
• S203 (i/p harness, near bulkhead grommet)
• Sensor)
• Vehicle control module (left radiator support)

7.4L (VIN N), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997

List of elements for 7.4L (VIN N), Air Conditioning Wiring Diagrams for GMC Forward Control P3500 1997:

• (engine harness, 15 cm from compressor clutch)
• (i/p harness, 41 cm from bulkhead grommet)
• (provisions for body builder hvac system)
• A/c compressor clutch
• A/c compressor clutch relay (right side of driver's island)
• A/c compressor high pressure cutoff switch (rear of compressor)
• A/c compressor refrigerant pressure switch (rear of compressor)
• Diode
• Eng-bat fuse 15a
• G206 (below driver's island)
• Hot at all times
• I/p fuse box
• S122
• S123 (engine harness, 15 cm from a/c compressor clutch)
• S203