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.
Power Windows: Operation: Sub-Switch
When ignition switch is in ON position, battery voltage is applied to the power window relay through 10-amp fuse No. 10 (Accent) or fuse No. 16 (Elantra and Tiburon), located in passenger compartment fuse panel. When relay is energized, battery voltage is supplied to the master switch assembly through closed relay contacts. When a sub-switch is operated, battery voltage is applied to the power window motor. The motor is then grounded through the opposite contact in the respective sub-switch and master switch assembly.
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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.