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 Probe V6-182 3.0LFACTORY OEM SERVICE PROCEDURE
Main Relay (Computer/Fuel System): Description and Operation
Integrated Relay Control Module (IRCM):
The power relay supplies voltage to the Electronic Control Assembly (ECA) when the ignition key is in the ON position. The relay also provides reverse polarity protection by using either internal or external series diodes.
The power relay is contained in the Integrated Relay Control Module (IRCM). The IRCM also contains the fuel pump relay, and the cooling fan relay.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.