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.
Cooling - Electrical Diagnostics: Operation
The radiator cooling fan is designed to keep the cooling system operating at a set temperature. The cooling fan operates when the engine coolant temperature exceeds 106 degrees Celsius or when the A/C has been requested on. The powertrain control module sends an input to the radiator fan control module to activate the cooling fan. The radiator fan control module receives voltage from fuse 2 (50 amp) in the engine fuse block. The radiator fan control module is grounded through G100.
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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.