COOLING FAN – GMC Forward Control P3500 1997 – SYSTEM WIRING DIAGRAMS

COOLING FAN

6.5L

6.5L (VIN F), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997

List of elements for 6.5L (VIN F), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997:

• (i/p harness, 41 cm from bulkhead grommet)
• Auxiliary engine coolant fan
• Auxiliary engine coolant fan a/c pressure switch (in a/c high pressure line)
• Auxiliary engine coolant fan relay (main support bracket, behind steering column)
• Auxiliary fan control switch (on right side of cylinder head)
• Eng 1 fuse 20a
• G200 (left interior bulkhead)
• Hot at all times
• Hot in run
• I/p fuse box
• Pnk
• Red
• S128 (engine harness, 12 cm from glowplug control (6.5l vin f) or 30 cm from cruise module breakout (7.4l vin n))
• S203

6.5L (VIN Y), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997

List of elements for 6.5L (VIN Y), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997:

• Auxiliary engine coolant fan
• Auxiliary engine coolant fan a/c pressure switch (in a/c high pressure line)
• Auxiliary engine coolant fan relay (engine bulkhead relay bracket, under battery junction block)
• Eng 1 fuse 20a
• G200 (left interior bulkhead)
• Hot at all times
• Hot in run
• I/p fuse box
• Pnk
• Red
• S110 (engine harness, 4 cm from electronic brake control module)
• S116 (engine harness, 5 cm from right glow plug breakout)

7.4L

7.4L (VIN J), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997

List of elements for 7.4L (VIN J), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997:

• (i/p harness, 41 cm from bulkhead grommet)
• Auxiliary engine coolant fan
• Auxiliary engine coolant fan a/c pressure switch (in a/c high pressure line)
• Auxiliary engine coolant fan relay (main support bracket, behind steering column)
• Eng 1 fuse 20a
• G200 (left interior bulkhead)
• Hot at all times
• Hot in run
• I/p fuse box
• Pnk
• Red
• S128 (engine harness, 12 cm from egr breakout)
• S203
• Vehicle control module (top of radiator support)

7.4L (VIN N), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997

List of elements for 7.4L (VIN N), Cooling Fan Wiring Diagram for GMC Forward Control P3500 1997:

• (i/p harness, 41 cm from bulkhead grommet)
• Auxiliary engine coolant fan
• Auxiliary engine coolant fan a/c pressure switch (in a/c high pressure line)
• Auxiliary engine coolant fan relay (main support bracket, behind steering column)
• Auxiliary fan control switch (on right side of cylinder head)
• Eng 1 fuse 20a
• G200 (left interior bulkhead)
• Hot at all times
• Hot in run
• I/p fuse box
• Pnk
• Red
• S128 (engine harness, 12 cm from glowplug control (6.5l vin f) or 30 cm from cruise module breakout (7.4l vin n))
• S203