1985-1989 LeBaron & Lancer Headlight Assembly: Solving the GTS vs. Coupe Confusion

Don't Get Stuck With the Wrong Part: LeBaron GTS vs. Other Models

The most common mistake when buying this part is assuming all Chrysler LeBarons from 1985-1989 are the same. They are not. The headlight assembly discussed in this guide ONLY fits the Chrysler LeBaron GTS hatchback and the Dodge Lancer hatchback. These two cars were built on Chrysler's H-platform and were nearly identical.

During the same years, Chrysler also sold LeBaron coupes, convertibles, and sedans. These other models were built on different platforms (like the J-platform and K-platform) and have completely different front-end styling. Many of these non-GTS models used pop-up headlights or different composite assemblies that are not interchangeable with the GTS/Lancer parts. Always verify you are buying for a LeBaron GTS hatchback or a Dodge Lancer.

Symptoms of a Failing Headlight Assembly

Problems can arise from the housing itself, the bulb, or the wiring. Here’s how to tell what's wrong:

• Dim or Yellowed Light Output: This is usually caused by an old sealed beam bulb nearing the end of its life. The lens of the assembly itself can also become hazed or yellowed from UV exposure, which blocks light.
• Moisture or Condensation Inside the Lens: The seal between the lens and the housing has failed, or there is a crack in the plastic. This can cause bulbs to burn out prematurely and corrode electrical sockets.
• Headlight is Loose or Vibrates: This indicates broken or cracked mounting tabs on the assembly housing. This is very common on aging plastic parts and will cause the headlight beam to shake while driving, which is distracting and unsafe.
• One Beam Works but Not the Other: If your low beams work but high beams don't (or vice-versa), this is almost always a problem with the sealed beam bulb itself or the headlight switch/relay, not the assembly housing.
• Headlights Don't Turn On At All: If both headlights are out, the problem is likely not the assemblies themselves but could be a fuse, a bad headlight relay, the main switch, or a wiring issue.

Buying a Used Headlight Assembly: A Buyer's Guide

Since new OEM assemblies are no longer made, buying a quality used part is often the only option. Here is what to inspect carefully:

• Mounting Tabs and Points: This is the most critical inspection point. Carefully check every mounting tab and screw hole for cracks, fractures, or signs of repair (like epoxy or glue). A broken tab means the assembly won't mount securely.
• Lens Condition: Look for deep pitting, 'crazing' (a network of fine cracks), yellowing, or hazing. Minor hazing can sometimes be polished out, but heavy UV damage is permanent.
• Housing Integrity: Inspect the entire plastic body of the assembly for cracks. Old plastic becomes brittle and can be easily damaged during shipping or installation.
• Adjuster Screws: Locate the two aiming screws. Try to turn them gently to ensure they are not seized with rust. If they are frozen, you will not be able to aim your headlight properly.
• Bulb Sockets and Connectors: Check the sockets for the side marker and turn signal bulbs. Look for any signs of melting, charring, or green/white corrosion on the metal contacts. Damaged sockets may require rewiring.

Headlight Technology: Sealed Beams Explained

The 1985-1989 LeBaron GTS and Dodge Lancer use a H6054 rectangular sealed beam halogen headlight. This is a self-contained unit where the filament (bulb), reflector, and lens are all one piece. When the filament burns out, you replace the entire unit. This is very different from modern headlights where you only replace a small bulb within a larger housing.

• No Ballasts or Igniters: These cars do not use HID/Xenon or LED technology from the factory. They do not require ballasts, igniters, or LED driver modules.
• Upgrading to LED: You can upgrade to modern LED lighting by purchasing an H6054-sized LED conversion unit. These are designed to be a direct replacement for the original sealed beam and will plug into the factory wiring. No special modules are typically needed, but be sure to buy from a reputable brand to ensure a proper beam pattern that won't blind other drivers.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

For vehicles of this age, there are no active recalls specifically for the headlight assembly itself. Searches of the NHTSA database show no recalls for this specific component on these models. Most issues are related to age and material degradation. Some owners have reported intermittent headlight operation, which is often traced back to the headlight switch or a relay, rather than the assembly.

Step-by-Step Replacement and Aiming

Replacement

Replacing the assembly is straightforward for a DIY mechanic. While specific steps vary slightly, the general process is:

1. Remove any trim or grille sections that cover the headlight assembly. These are typically held by screws or clips.
2. Unplug the main headlight wiring harness connector.
3. Remove the mounting bolts or screws that hold the headlight assembly to the vehicle's core support.
4. Carefully pull the old assembly out.
5. Installation is the reverse of removal. Transfer any bulbs or wiring from the old assembly to the new one if needed.

Aiming the Headlight

After installation, you MUST aim the headlight. An improperly aimed headlight reduces your visibility and can blind oncoming drivers.

1. Park the car on a level surface about 25 feet away from a flat, vertical wall (like a garage door).
2. Turn on the low beams. You should see two distinct hotspots on the wall.
3. Cover one headlight. On the assembly of the uncovered headlight, locate the two adjustment screws. One controls vertical (up/down) aim, and the other controls horizontal (left/right) aim.
4. Turn the screws in small increments (a quarter turn at a time) to move the beam. The goal is to have the brightest part of the beam pattern slightly below the center height of the headlight and aimed straight ahead or slightly to the right.
5. Cover the adjusted headlight and repeat the process for the other side.

Cost Comparison

Prices can vary, but this gives a general idea of what to expect.

Frequently Asked Questions (FAQ)

Technical Specifications

OEM Part Numbers (Verified for Side Marker Lamp Component):

• 4270961 (Chrysler)
• 4321685 (Chrysler, Dodge, Mopar)
• 4334337 (Chrysler)

Note: These part numbers appear to correspond specifically to the side marker lamp portion of the assembly, which was available separately in some cases. The entire assembly will have a different part number.

Headlight Bulb Type: H6054 (200mm rectangular) Halogen Sealed Beam