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.
A/C Clutch Relay
Refer to terminal numbers molded on A/C clutch relay. Measure resistance between terminals No. 1 and 2. Resistance reading should be 40-120 ohms. See Fig 1 . If resistance readings are not as specified, replace A/C clutch relay. Check for continuity between terminals No. 3 and 4 and between terminals No. 3 and 5. There should be no continuity. If continuity is present, replace A/C clutch relay. For additional testing of A/C clutch relay circuit, refer to appropriate SELF-DIAGNOSTICS article.
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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.