Bonneville V6-3800 3.8L (1991)
Radiator Cooling Fan Motor Relay: Description and Operation
Wiring Diagram
The electric cooling fans operate when the ECM grounds the cooling fan relay(s) winding. The relays then close and complete the circuit between the 40
amp maxi-fuse and the fan motor.
The ECM determines the operation of the fan based on A/C head pressure, engine coolant temperature, vehicle speed and A/C request signal inputs.
