What is the low beam headlight bulb size for a 1991 Cadillac Brougham?

The 1991 Cadillac Brougham 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 1991 Cadillac Brougham?

The high beam bulb size for the 1991 Cadillac Brougham is 194.

Why are my 1991 Cadillac Brougham headlights dim?

Dim headlights on a 1991 Cadillac Brougham 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 1991 Cadillac Brougham fog light?

The 1991 Cadillac Brougham uses a LED Fog Light bulb for the fog light position.

Is the 1991 Cadillac Brougham single or dual beam?

The 1991 Cadillac Brougham uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1991 Cadillac Brougham?

Yes, the 1991 Cadillac Brougham 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 1991 Cadillac Brougham have fog lights?

Yes, the 1991 Cadillac Brougham takes a LED Fog Light bulb for the fog light position.

Did the 1991 Cadillac Brougham change headlight bulb sizes from the previous year?

Yes — the 1991 Cadillac Brougham uses different bulb sizes than the 1990 model. The 1991 generation introduced this bulb configuration.

Is the 1991 Cadillac Brougham the first or last year to use 9004 LED bulbs?

The 1991 Cadillac Brougham is the only year in the 1991 generation to use the 9004 LED bulb for the low beam headlight.

How do I change the headlight on a 1991 Cadillac Brougham?

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 1991 Cadillac Brougham?

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 1991 Cadillac Brougham 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 1991 Cadillac Brougham?

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 1991 Cadillac Brougham has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1991 Cadillac Brougham

What Size Bulbs Does a 1991 Cadillac Brougham 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 1991 Cadillac Brougham Have?

Lighting on the 1991 Cadillac Brougham is managed by a total of 13 bulbs, covering everything from primary headlights to signal indicators. 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 late years of the Brougham's 1987-1992 production span.

Can You Put LED Bulbs in a 1991 Cadillac Brougham?

Upgrading to LED is one of the most effective ways to modernize your Cadillac's appearance and safety profile. 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.

1991 Cadillac Brougham 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	PC195	Buy PC195 →
Side Marker	24 LED	Buy 24 LED →
Turn Signal Front	2057NA LED	Buy 2057NA LED →
Turn Signal Rear	3057 LED	Buy 3057 LED →
Reverse Light	1156	Buy 1156 →
Dome Light	561	Buy 561 →
License Plate	194	Buy 194 →
Map Light	561	Buy 561 →
Parking Light	2057NA	Buy 2057NA →
Trunk Light	1003	Buy 1003 →

How do the 1991 Cadillac Brougham's bulbs compare to other years?

The 1991 Cadillac Brougham changed bulb sizes from 1990. The previous model year used a different configuration.

The 1992 model switched to a different bulb configuration.

This bulb configuration covers the 1991 model years. ← 1990 1992 →

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Other Brougham Years

1992 1990 1989 1988 1987

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