Continental, Sable, TAURUS & THUNDERBIRD

Cooling fan is controlled by Integrated Relay Controller Module (IRCM) and Electronic Engine Control (EEC-IV) module. Modules energize cooling fan under following conditions:

• Engine temperature is above normal. On Thunderbird, low-speed fan comes on at temperature of 222°F (106°C) and goes off at 214°F (101°C). On Continental, Sable and Taurus, low-speed fan comes on at temperature of 215°F (102°C) and goes off at 210°F (99°C).
• A/C is on and vehicle speed is less than 43 MPH.
• Cooling fan is operated at high speed if engine temperature is higher than desirable and fan has been operating at a low speed. Fan comes on at temperature of 230°F (110°C), and goes off at 224°F (107°C). On Continental, with engine idling, cooling fan operates at high speed when coolant temperature reaches 236°F (113°F).

During hard acceleration, Wide Open Throttle A/C Cut-Off (WAC) relay controls A/C. A signal is first sent to EEC-IV module, then to IRCM, where IRCM de-energizes A/C clutch, decreasing engine load during acceleration.

Several different controllers are available depending on application. Proper operation of system cannot be obtained unless proper controller is used.

On Continental, Sable and Taurus, EEC-IV module is located in right rear corner of engine compartment, on firewall. IRCM is located in left front corner of engine compartment, on upper radiator support.

On Thunderbird, EEC-IV module is located behind right cowl panel, near radio antenna. IRCM is located in right front corner of engine compartment, near air cleaner assembly.