6 Years Available
Mercury Monarch Light Bulb Sizes
Complete bulb size reference for the Mercury Monarch from 1975 to 1980. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.
The Mercury monarch changed low beam specifications across model years — 1978–1980: H6054; 1975–1977: H6024. Make sure to select your exact year below to get the right bulb size.
Year Range
1975 – 1980
6 model yearsBulb Sizes Across Years
| Position | Bulb Type(s) | Years | Status |
|---|---|---|---|
| Turn Signal Front | 1157A(1975–1979) 1157(1980–1980) | 6 years | Changed |
| Side Marker | 194(1978–1980) 1157A(1977–1977) | 4 years | Changed |
| Low Beam | H6054(1978–1980) H6024(1975–1977) | 6 years | Changed |
| Brake Light | 1157(1975–1980) | 6 years | Consistent |
| Parking Light | 1157A(1975–1979) 1157(1980–1980) | 6 years | Changed |
| Turn Signal Rear | 1157(1975–1980) | 6 years | Consistent |
| Tail Light | 1157(1975–1980) | 6 years | Consistent |
| Reverse Light | 1156(1975–1980) | 6 years | Consistent |
| License Plate | 168(1977–1980) | 4 years | Consistent |
| High Beam | 194(1975–1980) | 6 years | Consistent |
Common Monarch Replacement Parts
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Frequently Asked Questions
We have bulb size data for the Mercury Monarch from 1975 to 1980, covering 6 model years. Select your year below for a complete position-by-position bulb chart.
Yes, the Mercury Monarch changed low beam bulb specifications across generations: 1978–1980: H6054; 1975–1977: H6024. Make sure to check your exact year using the list below.
The Mercury Monarch uses a H6054 bulb for the low beam and a 194 for the high beam. Select your year below for the exact fitment chart.
Yes. The Mercury Monarch uses a H6054 low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.
Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.