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.
Rear Window Defogger
2004 Acura 3.5RLSECTION Rear Window Defogger
- Turn ignition switch to ON position. Turn rear window defogger switch to ON position. Using a DVOM, check for voltage between body ground and positive terminal of rear window defogger. See Fig 1 . If battery voltage exists, go to next step. If battery voltage does not exist, check for faulty rear window defogger relay. See REAR WINDOW DEFOGGER RELAY under COMPONENT TESTS. Check rear window defogger switch operation. See REAR WINDOW DEFOGGER SWITCH under COMPONENT TESTS. Check rear window defogger coil operation. See REAR WINDOW DEFOGGER COIL under COMPONENT TESTS. Also check for open in Yellow/Blue wire between rear window defogger relay and rear window defogger. See WIRING DIAGRAMS .
- Turn rear window defogger switch to OFF position. Using a DVOM, check for continuity between body ground and ground side of rear window defogger. See Fig 1 . If continuity is indicated, check grid filament operation. See GRID FILAMENT under COMPONENT TESTS. If continuity is not indicated, check for open in Black wire between rear window defogger coil and rear window defogger.
RENDER: 1.0x
NO RELATED
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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.