2020 Corvette Headlight Issues: Diagnosis and Repair Guide

How to Fix Lights Issue

The 2020 Chevrolet Corvette is a marvel of engineering, but like any vehicle, it can experience occasional issues. Some owners have reported problems related to the headlights. One owner shared, "Cycling the switch on and off again had one come up, another 2 cycles of the switch had them both working again." It seems the lights might need some extra attention to get them to function correctly. This guide will help you diagnose and potentially fix headlight issues on your vehicle.

Symptoms

The most commonly reported symptom is related to the headlight operation. Owners have described instances where the headlights fail to deploy or retract properly. The lights can become stalled. You may experience one headlight working while the other doesn't. Also, sometimes the lights flashed intermittently. Cycling the headlight switch on and off repeatedly seems to provide a temporary solution for some owners, suggesting an electrical connection issue.

Beyond simple functionality, some owners also addressed the aesthetics of the lighting system. These owners wanted to change the brightness of the lights. One owner chose to swap the headlights entirely for an alternative design. Also, some owners have experienced reactions that include corrosion build-up.

These symptoms can be frustrating and potentially dangerous, especially when driving at night. Addressing these issues promptly is crucial to ensure safe operation of your 2020 Chevrolet Corvette.

Most Likely Cause

Based on owner reports, the most likely cause of headlight problems in your 2020 Chevrolet Corvette is related to chips or solder joints within the headlight control module. Corrosion can cause issues. Also, sometimes the modules may be cracked. These chips can weaken over time due to vibration and temperature fluctuations, leading to intermittent or complete failure of the headlight system.

How to Diagnose

Diagnosing a faulty headlight control module requires a systematic approach.

1. Visual Inspection: Begin by visually inspecting the headlight assembly for any signs of damage, such as cracks, broken wires, or loose connections.
2. Check the Bulbs: Ensure that both headlight bulbs are in good working condition. Replace any burnt-out bulbs.
3. Inspect the Headlight Module: You'll need to locate the headlight control module. Refer to your 2020 Chevrolet Corvette service manual for its exact location. Once located, carefully remove the module and inspect it for any visible signs of damage, such as cracked solder joints or corrosion on the connector pins.
4. Test Module Connections: Check the electrical connector for corrosion or loose wires. Clean the connector with electrical contact cleaner.
5. Test the Headlight Switch: Use a multimeter to test the headlight switch for proper function. Refer to the service manual for the correct voltage readings.
6. Scan for Error Codes: Use an OBD-II scanner to check for any error codes related to the headlight system. While a generic scanner may provide some information, a scanner specifically designed for GM vehicles will provide more detailed diagnostic information.
7. Tools Required:
   • Screwdrivers (various sizes)
   • Socket set
   • Multimeter
   • OBD-II scanner
   • Electrical contact cleaner
   • Service manual for your 2020 Chevrolet Corvette

Step-by-Step Fix

If you've diagnosed a faulty headlight control module, here's how you can attempt a fix:

1. Disconnect the Battery: Before starting any electrical work, disconnect the negative terminal of your car's battery to prevent electrical shorts.
2. Remove the Headlight Control Module: Locate the headlight control module (refer to your service manual). Disconnect the electrical connectors and remove the module.
3. Inspect the Module: Carefully inspect the module for any signs of damage, such as cracked solder joints or corrosion. As one owner reported: "Since car was down anyway, waiting on insulation, I decided to pull the module and check it. I saw no problem with any of the solder joints, but I did find corrosion on one of pins in the plug." (source)
4. Resolder Cracked Joints: If you find any cracked solder joints, carefully resolder them using a soldering iron and solder. Ensure that the solder joints are clean and strong.
5. Clean Corroded Pins: If you find corrosion on the connector pins, clean them with electrical contact cleaner and a small brush.
6. Apply Epoxy (Optional): Some owners have reported success in reinforcing the solder joints by applying a thin layer of epoxy over them. This can help prevent future cracks.
7. Reinstall the Module: Reconnect the electrical connectors and reinstall the headlight control module in its original location.
8. Reconnect the Battery: Reconnect the negative terminal of your car's battery.
9. Test the Headlights: Test the headlights to ensure that they are functioning properly.
10. Alternative Solutions: If repairing the module is unsuccessful, consider replacing it with a new or refurbished unit. Some owners also opt to modify the headlight system. As one owner shared: "I worked out a deal with a member to trade my 4eyec5 lights for his KnightDrive lights. I feel they sit lower than the 4 eye kit which is nice." (source)

Parts and Tools Needed

• Headlight Control Module: (Check with your local Chevrolet dealer or online parts retailer for the correct part number for your 2020 Chevrolet Corvette).
• Solder: High-quality electronic solder.
• Soldering Iron: A soldering iron with a fine tip for precision work.
• Electrical Contact Cleaner: A spray cleaner designed for cleaning electrical connections.
• Epoxy: (Optional) A two-part epoxy for reinforcing solder joints.
• Screwdrivers: Various sizes of screwdrivers.
• Socket Set: A socket set for removing and installing the headlight control module.
• Multimeter: For testing electrical connections.
• OBD-II Scanner: For reading diagnostic codes.

Real Owner Costs

The cost of fixing headlight problems on your 2020 Chevrolet Corvette can vary depending on the cause and the chosen solution.

DIY Repair:

• Resoldering the module: This can cost as little as $10-$20 for solder and electrical contact cleaner if you already have a soldering iron and basic tools.
• Replacing corroded pins: The cost of a new connector pin can be minimal, ranging from $5-$10.

Professional Repair:

• Diagnosis: A mechanic might charge $75-$150 for diagnosing the headlight issue.
• Module Repair: If a mechanic resolders the module, it could cost $100-$300, depending on labor rates.
• Module Replacement: Replacing the headlight control module could cost $300-$600, including the cost of the module and labor.

Some owners opt for aftermarket solutions or modifications. As one owner expressed: "I will replace them with small spot light things in the grill opening. I dont drive a lot in the dark anyway, and Im trying to move weight around to make turn in better on the car." (source) These modifications can range from $200 to $1000 or more, depending on the complexity and quality of the parts.

Prevention

To prevent headlight problems on your 2020 Chevrolet Corvette, consider the following:

• Regular Inspections: Periodically inspect the headlight assemblies for any signs of damage or corrosion.
• Proper Maintenance: Ensure that all electrical connections are clean and secure.
• Avoid Moisture: Protect the headlight control module from moisture and extreme temperatures.
• Gentle Operation: Avoid slamming the headlight switch, as this can put stress on the module's internal components.
• Address Issues Promptly: If you notice any signs of headlight malfunction, address them promptly to prevent further damage.
• Headlight Cycling: "Cycling the switch on and off again" may help maintain contact points.

What Owners Say

Real experiences from CHEVROLET owners:

Success Stories

"Quote: Originally Posted by smitty2919 I worked out a deal with a member to trade my 4eyec5 lights for his KnightDrive lights. I feel they sit lower than the 4 eye kit which is nice." — knewblewkorvette (source)

"I worked out a deal with a member to trade my 4eyec5 lights for his KnightDrive lights. I feel they sit lower than the 4 eye kit which is nice." — smitty2919 (source)

Owner Experiences

"Since car was down anyway, waiting on insulation, I decided to pull the module and check it. I saw no problem with any of the solder joints, but I did find corrosion on one of pins in the plug." — MWWarlord (source)

"Read on a forum about a couple of people that had the same issue, and upon opening up the headlight control module, they found cracked solder joints. Since car was down anyway, waiting on insulation, I decided to pull the module and check it." — MWWarlord (source)

"Bought the bronze gear repair kit for both sides. Pop-ups work great now and hopefully will last forever (or till the motor itself dies -for which I already have two spare motors on my C5 parts shelf-)." — Cherrywine362 (source)

FAQ

Q: How long does it take to fix the headlight issue?

A: If the problem is a simple cracked solder joint, resoldering the module can take 1-2 hours for a DIY repair. Replacing the module at a shop might take 2-4 hours.

Q: Can I drive with the headlight problem?

A: Driving with malfunctioning headlights is unsafe, especially at night. It's recommended to fix the issue before driving the car, especially in low-light conditions. If one headlight is working, you can drive carefully during the day, but avoid driving at night until the problem is resolved.

Q: Is this a common issue on the 2020 Chevrolet Corvette?

A: While not every 2020 Chevrolet Corvette experiences headlight problems, it is a known issue reported by some owners. Factors like age, environmental conditions, and driving habits can contribute to the likelihood of this problem occurring.

Q: DIY vs mechanic - what's recommended?

A: If you have experience with soldering and basic electrical work, repairing the headlight control module yourself can save you money. However, if you're not comfortable working on electrical components, it's best to take your car to a qualified mechanic. A mechanic will have the necessary tools and expertise to diagnose and repair the problem correctly. If it involves swapping light styles, a professional will be helpful.