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.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Selection switch indicator
- Disconnect the negative battery terminal.
- Perform the following procedure.
- Left selection switch indicator: Apply battery positive voltage to power window main switch terminal L, and connect terminal P to ground.
- Right selection switch indicator: Apply battery positive voltage to power window main switch terminal I, and connect terminal P to ground.
- Verify that the LED is turned on.
- If the LED does not turn on, replace the power window main switch. (See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION .)
Factory Service Tools
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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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