What is the low beam headlight bulb size for a 1973 Ford F-350?

The 1973 Ford F-350 uses a N/A bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1973 Ford F-350?

The high beam bulb size for the 1973 Ford F-350 is 194.

Why are my 1973 Ford F-350 headlights dim?

Dim headlights on a 1973 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 N/A LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1973 Ford F-350 fog light?

The 1973 Ford F-350 typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 1973 Ford F-350 single or dual beam?

The 1973 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 1973 Ford F-350?

Yes, the 1973 Ford F-350 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a N/A LED conversion kit for the low beams.

Did the 1973 Ford F-350 change headlight bulb sizes from the previous year?

Yes — the 1973 Ford F-350 uses different bulb sizes than the 1972 model. The 1973 generation introduced this bulb configuration.

Is the 1973 Ford F-350 the first or last year to use N/A bulbs?

The 1973 Ford F-350 is the only year in the 1973 generation to use the N/A bulb for the low beam headlight.

How do I change the headlight on a 1973 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 N/A 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 1973 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 N/A 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 1973 Ford F-350 headlights?

A pair of halogen N/A 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 1973 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 N/A position are available as direct plug-and-play replacements.

The 1973 Ford F-350 has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1973 Ford F-350

What Size Bulbs Does a 1973 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 1973 Ford F-350 Have?

Lighting on the 1973 Ford F-350 is managed by a total of 8 bulbs, covering everything from primary headlights to signal indicators. It features a comprehensive lighting system powered by a dual-bulb halogen configuration using separate 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 1973 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 low beams, as they see the most use. Adding a matching 194 LED kit later will complete the look and ensure consistent lighting performance.

1973 Ford F-350 Bulb Size Chart

Position	Bulb Size	Shop
Turn Signal Front	1157A	Buy 1157A →
Side Marker	194	Buy 194 →
Reverse Light	1156	Buy 1156 →
Parking Light	1157A	Buy 1157A →
Brake Light	1157	Buy 1157 →
Turn Signal Rear	1157	Buy 1157 →
Tail Light	1157	Buy 1157 →
High Beam	194	Buy 194 →

How do the 1973 Ford F-350's bulbs compare to other years?

The 1973 Ford F-350 changed bulb sizes from 1972. The previous model year used a different configuration.

The 1975 model switched to a different bulb configuration.

This bulb configuration covers the 1973 model years. ← 1972 1975 →

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Other F-350 Years

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