What Size Bulbs Does a 1990 Jeep Comanche 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 Jeep Comanche Have?
The 1990 Jeep Comanche features an extensive lighting system with 11 bulb positions. It uses halogen technology with H6054 LED low beams and 194 high beams in a dual-bulb configuration. The Comanche has been available from 1986 to 1991, and the 1990 model falls in the late-generation years. As a Jeep vehicle, it uses a CANbus electrical system that monitors bulb status.
LED Flicker Warning
This vehicle (Jeep) is known to use a CANbus system that checks for burnt-out bulbs. Installing standard LEDs may cause them to flicker or trigger a dashboard error.
We highly recommend using a CANbus decoder or "Anti-Flicker" resistors.
Can You Put LED Bulbs in a 1990 Jeep Comanche?
To upgrade the 1990 Jeep Comanche headlights to LED, you will need a H6054 LED LED kit for the low beams and a 194 LED kit for the high beams. Start with the low beams since they are used most often and have the biggest impact on nighttime visibility. Important: Jeep vehicles use a CANbus system that detects bulb wattage. Standard LED bulbs may trigger dashboard warnings or flicker. Choose LED kits labeled "CANbus-compatible" or add inline decoder resistors to prevent these issues. For the fog lights, a LED Fog Light LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 1990 Jeep Comanche
To remove the headlight bulb, disconnect the wiring harness, then twist the bulb counter-clockwise and pull it straight out of the housing. Older model years like the 1990 Comanche typically offer easy access to the headlight bulbs from behind the headlight assembly under the hood. Most owners can complete the swap in under 10 minutes per side. When installing the new bulb, avoid touching the glass with bare fingers. Skin oils create hot spots that shorten bulb life. Wear clean gloves or handle the bulb by its plastic base only. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the LED Fog Light fog light socket.
Full Upgrade Bundle
Upgrade All 11 Positions at Once
1990 Jeep Comanche Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | H6054 LED | Buy H6054 LED |
High Beam | 194 | Buy 194 |
Fog Light | LED Fog Light | Buy LED Fog Light |
Brake Light | Brake Light Assembly | Buy Brake Light Assembly |
Side Marker | 194 LED | Buy 194 LED |
Turn Signal Front | 2057 LED | Buy 2057 LED |
Turn Signal Rear | 1156 LED | Buy 1156 LED |
Reverse Light | 1156 | Buy 1156 |
License Plate | 97 | Buy 97 |
Parking Light | 2057 | Buy 2057 |
Trunk Light | 561 | Buy 561 |
Want to upgrade everything at once?
Shop Complete LED Kit for 1990 Jeep ComancheHow Long Do 1990 Jeep Comanche Headlight Bulbs Last?
Standard halogen headlights on the 1990 Jeep Comanche have an expected lifespan of 500 to 1,000 hours, which works out to roughly 2 to 3 years of normal use. Signs of a failing halogen bulb include noticeably dimmer output, a yellowish tint compared to the other headlight, or intermittent flickering. At 36 years old, the original bulbs on your Comanche are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.
What Bulbs Are Compatible with the 1990 Jeep Comanche?
The H6054 low beam bulb on the 1990 Jeep Comanche is a specific fitment. There are no widely recognized cross-compatible alternatives, so make sure to purchase the exact H6054 size. Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.
1990 Jeep Comanche Headlight FAQ
Did Jeep Comanche Bulb Sizes Change Over the Years?
Over its production run from 1986 to 1991, the Jeep Comanche has seen bulb size changes in the High Beam, Turn Signal Front and License Plate positions. The 1990 model uses the newer bulb specification introduced around 1989. Always verify the exact bulb size for your specific 1990 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other Comanche Years
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Other Vehicles That Use H6054 LED Bulbs
These vehicles from other makes also use a H6054 LED low beam bulb: