What is the low beam headlight bulb size for a 1990 Ford F-350?

The 1990 Ford F-350 uses a 9004 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1990 Ford F-350?

The high beam bulb size for the 1990 Ford F-350 is 194.

Why are my 1990 Ford F-350 headlights dim?

Dim headlights on a 1990 Ford F-350 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9004 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1990 Ford F-350 fog light?

The 1990 Ford F-350 uses a LED Fog Light bulb for the fog light position.

Is the 1990 Ford F-350 single or dual beam?

The 1990 Ford F-350 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1990 Ford F-350?

Yes, the 1990 Ford F-350 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9004 LED LED conversion kit for the low beams.

Does the 1990 Ford F-350 have fog lights?

Yes, the 1990 Ford F-350 takes a LED Fog Light bulb for the fog light position.

Did the 1990 Ford F-350 change headlight bulb sizes from the previous year?

No — the 1990 Ford F-350 uses the same bulb sizes as the 1989 model. This configuration has been consistent across the 1989–1991 generation.

How do I change the headlight on a 1990 Ford F-350?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old 9004 LED bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 1990 Ford F-350?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved 9004 LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 1990 Ford F-350 headlights?

A pair of halogen 9004 LED bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 1990 Ford F-350?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the 9004 LED position are available as direct plug-and-play replacements.

The 1990 Ford F-350 shares its bulb sizes with the 1989–1991 generation.

Fitment Guaranteed for 1990 Ford F-350

What Size Bulbs Does a 1990 Ford F-350 Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 1990 Ford F-350 Have?

When it comes to nighttime visibility, the 1990 Ford F-350 relies on an arrangement of 14 specialized bulbs. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 9004 LED low beam and 194 high beam bulbs for precise light distribution. This model belongs to the mid years of the F-350's 1958-2015 production span.

Can You Put LED Bulbs in a 1990 Ford F-350?

For a Ford built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. We recommend starting your upgrade with the 9004 LED low beams, as they see the most use. Adding a matching 194 LED kit later will complete the look and ensure consistent lighting performance. Don't forget the LED Fog Light fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1990 Ford F-350 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9004 LED	Buy 9004 LED →
High Beam	194	Buy 194 →
Fog Light	LED Fog Light	Buy LED Fog Light →
Brake Light	194	Buy 194 →
Side Marker	194 LED	Buy 194 LED →
Turn Signal Front	3157 LED	Buy 3157 LED →
Turn Signal Rear	3157 LED	Buy 3157 LED →
Reverse Light	3156	Buy 3156 →
Dome Light	912	Buy 912 →
License Plate	194 or 97	Buy 194 or 97 →
Map Light	105	Buy 105 →
Parking Light	3157	Buy 3157 →
Trunk Light	912	Buy 912 →
Tail Light	3157CK	Buy 3157CK →

How do the 1990 Ford F-350's bulbs compare to other years?

The 1990 Ford F-350 uses the same bulbs as the 1989 model.

The 1991 model continues with the same bulb sizes.

This bulb configuration covers the 1989–1991 model years. ← 1989 1991 →

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Other F-350 Years

2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1973 1972 1960 1959 1958

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