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.
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HOMESERVICE MANUALSHYUNDAI1994SONATA GLS, 2.0 F, STANDARDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTHEATED GLASS/DEFOGGERSDEFOGGER - REAR WINDOWCOMPONENT TESTINGGRID FILAMENT
1994 Hyundai Sonata GLS, 2.0 F, Standard
Grid Filament
1994 Hyundai Sonata GLS, 2.0 F, StandardSECTION Grid Filament
- Wrap a small piece of aluminum foil around voltmeter probes and make a flat area with foil. SeeFig 1 . Turn defogger switch to ON position. Position voltmeter probes to measure voltage from center point of each filament line to the outer edge line. SeeFig 1 . A reading of about 6 volts indicates a good filament. A reading of 12 volts indicates a break in filament between center and positive side.
- A reading of zero volts indicates a break in filament line between center point and negative side of line tested. To locate break, move probe along filament line until voltmeter needle moves abruptly. A broken filament may be repaired using conductive paint, after removing silicone covering. See GRID FILAMENT REPAIR under ON-VEHICLE SERVICE. SeeFigure .
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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.