1999-2001 LHS & 2002-2004 Concorde Headlight: Solving Moisture & Replacement

Compatibility and Key Information

This headlight assembly is specifically for the 1999-2001 Chrysler LHS and the facelifted 2002-2004 Chrysler Concorde. These vehicles share a similar front-end design, allowing for this interchange. It is important to note that these headlights will not fit the 1998-2001 Chrysler Concorde, which used a different headlight shape before its 2002 model year update. These vehicles were factory-equipped with halogen headlights, and no factory HID/Xenon option was offered. Therefore, these assemblies are designed exclusively for halogen bulbs.

Symptoms of a Failing Headlight Assembly

Failure of a headlight assembly can manifest in several ways, impacting both safety and vehicle appearance.

• Dim or Yellowed Headlights: The most common issue is oxidation or UV damage to the polycarbonate lens. This causes a hazy, yellowed appearance that significantly reduces light output and can make night driving dangerous.
• Moisture or Condensation Inside: Water droplets or a foggy appearance inside the lens is a sign that the seal between the lens and the housing has failed. This can cause bulbs to burn out prematurely and can lead to corrosion of the reflective surfaces inside the housing.
• Cracked Lens or Housing: Physical damage from road debris or minor impacts can crack the lens or housing, allowing moisture and dirt to enter and compromising the assembly's integrity.
• Electrical Issues: While less common for the assembly itself, the wiring harness connector or bulb sockets can degrade over time, leading to flickering or non-functional lights.

Known Issues, TSBs, and Recalls

While no specific recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) target this specific headlight assembly for widespread defects, owner complaints frequently mention two main problems:

• Lens Hazing/Yellowing: Like many vehicles from this era, the polycarbonate lenses are prone to UV degradation over time. This is a gradual process but is the most common reason for replacement.
• Seal Failure and Moisture Intrusion: A common complaint on forums is the failure of the factory sealant, leading to condensation. This happens when the seal between the clear lens and the black plastic housing breaks down, allowing moist air to enter. When the headlight heats up, the moisture turns to vapor, and when it cools, it condenses on the inside of the lens.

One recall for some aftermarket replacement lamps for these vehicles was issued because they lacked the required amber side reflectors, failing to meet federal safety standards. This highlights the importance of choosing quality replacement parts.

Buying a Used Headlight Assembly

A used OEM headlight assembly can be a great value, offering better fit and longevity than a cheap aftermarket part. Here’s what to inspect:

• Lens Clarity: Look for a clear, non-yellowed lens. Minor hazing can sometimes be polished out, but a deeply yellowed or cloudy lens indicates it's near the end of its life.
• Mounting Tabs: Inspect all mounting tabs for cracks or breaks. These are crucial for a secure, vibration-free fit. Broken tabs are a major red flag, as the headlight will be loose and difficult to aim correctly.
• Seal Integrity: Check the seam where the clear lens meets the black housing. Look for any signs of prying, separation, or non-factory sealant, which might indicate a previous, failed attempt to fix a moisture issue.
• No Internal Moisture: There should be no signs of water lines, mineral deposits, or fogging inside the unit. A dry interior is critical.
• Reflector Condition: The chrome or silvered reflector surfaces inside should be bright and shiny. Any peeling, discoloration, or corrosion will drastically reduce light performance.
• Part Numbers: Verify the part number (e.g., 04780015AE) matches to ensure you are getting the correct part for your vehicle.

Replacement and Installation

Replacing the headlight assembly on the 1999-2001 LHS and 2002-2004 Concorde is a moderately involved process that requires removing parts of the front fascia.

1. Disconnect the negative battery terminal.
2. The procedure generally requires removing the upper radiator crossmember cover and potentially loosening the front bumper cover to gain access to all the headlight mounting bolts.
3. Once all fasteners are removed, the assembly can be pulled forward and the electrical connectors for the bulbs can be disconnected.
4. Installation is the reverse of removal. Be careful not to touch the glass of new halogen bulbs with your bare hands, as oils from your skin can cause them to fail prematurely.

Aiming the Headlights

After installation, the headlights MUST be aimed. A properly aimed headlight ensures you can see the road without blinding oncoming drivers. This is typically done using adjustment screws on the back or top of the headlight housing. The vehicle should be on a level surface, facing a wall or garage door, to properly adjust the height and direction of the light beams.

Bulb Information

These assemblies are designed for halogen bulbs. They do not require any separate ballasts or igniters like HID/Xenon systems.

• Low Beam: 9006XS (or 9006/HB4)
• High Beam: 9005XS (or 9005/HB3)

While many aftermarket LED "plug-and-play" bulbs are sold, they are often not legal for on-road use and may not perform well in a housing designed for halogen filaments, sometimes creating glare for other drivers.

Frequently Asked Questions