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.
Main Relay Inspection
- Disconnect negative cable at battery.
- Remove main relay (1) from relay box (2).
- Check resistance between each two terminals as follows. If check results are as specified, proceed to next operation check. If not, replace.
Main relay resistanceÂ
Between terminals "A" and "B": (Infinity)Â
Between terminals "C" and "C": 160 - 240 ohmÂ
- Check that there is continuity between terminals "A" and "B" when battery is connected to terminals "C" and "D". If found defective, replace.
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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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