Symptoms
- Outdoor fixture doesn't light up at all
- Fixture flickers or works intermittently, especially in wet weather
- Visible moisture or corrosion inside the fixture
Likely causes
- CommonA burned-out bulbSame as any fixture, worth checking first.
- CommonA tripped breaker or GFCI feeding exterior circuitsOutdoor circuits are typically GFCI-protected and can trip from moisture.
- CommonMoisture intrusion into the fixture or wiringA cracked gasket or damaged fixture seal lets in rain over time.
- PossibleCorroded wire connectionsExterior wiring is more prone to corrosion than interior wiring.
- PossibleA dusk sensor or timer preventing daytime operationWorth checking before assuming it's broken if you're testing during the day.
What to do
- Replace the bulb with a weather-appropriate one known to work.
- Check the breaker panel and any GFCI outlets that might feed the exterior circuit.
- Confirm whether the fixture has a dusk sensor or timer that only allows nighttime operation.
- Turn off the breaker and inspect the fixture's gasket and seal for cracks or gaps.
- Look for signs of water or corrosion inside the fixture base once opened safely with power off.
- Have an electrician check wiring for corrosion if moisture is found inside.
- Replace the fixture if it's old, cracked, or has significant internal corrosion.
Tools and parts
- Non-contact voltage tester
- Screwdriver
Outdoor-rated light fixtureSearch: “outdoor wall light fixture weatherproof”
When to call a pro
Call an electrician if you find moisture or corrosion in the wiring, or the fixture needs replacing.
Safety
Use caution
Turn off the breaker before opening any outdoor fixture, and don't handle it with wet hands.