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Home >> Ford >> 2020 >> Fusion SEL >> Repair and Diagnosis >> External Pages >> Different car >> Section 536 (Exterior Lighting (1 Of 2) (Hybrid/ENERGI)) >> Description And Operation >> Exterior Lighting - System Operation and Component Description >> Component Description >> Headlamp Assembly

Headlamp Assembly

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Exterior lamps are vented to accommodate normal changes in pressure. Condensation can be a natural by-product of this design. When moist air enters the lamp assembly through the vents, condensation can occur if the temperature is cold. When normal condensation occurs, a thin mist forms on the interior of the lens. The thin mist eventually clears and exits through the vents during normal operation. The amount of time it takes to clear the lens of acceptable mist varies with ambient humidity and lamp types. Normal condensation clears from any lamp in 48 hours under dry conditions.

Do not replace a lamp assembly with acceptable levels of condensation such as the presence of thin mist (no streaks, drip marks or droplets are present) or a fine mist covers less than 50% of the lens.

Examples of unacceptable moisture (usually caused by a lamp housing leak) are water puddling inside the lamp or large water droplets, drip marks or streaks present on the interior of the lens.