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.
Cold Override Temperature Switch
To test temperature switch with engine cold: Turn ignition switch on. If CEC solenoid plunger does not energize, or, if it energizes and retracts after 25 seconds, remove green and white wire at temperature switch and ground it. This will activate solenoid plunger, indicating a defective temperature switch. To test temperature switch with engine warm: Allow engine to cool. Then, with wires connected and unit grounded, solenoid should energize and remain energized. If it does not, switch is defective.
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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.