Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1991 Ford Taurus L4-153 2.5L HSCFACTORY OEM SERVICE PROCEDURE
Integrated Control Relay Module: Description and Operation
Integral Relay Control Module (IRCM)
Integral Relay Control Module (IRCM):
The Integral Relay Control Module (IRCM) interfaces with EEC-IV processor to provide control of the cooling fan, A/C clutch, and the fuel pump. The module also incorporates the EEC power relay to provide power to EEC-IV system.
The module is designed specifically for underhood application. The limits of operation are as follows:
Operating Temperature -30°C to 100°C
Storage Temperature -40°C to 125°C
Operating Voltage 7 to 17 volts
NOTE: The fuel pump relay on the 3.8L Supercharged package is not part of the IRCM.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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