PETERBILT 2649678 Headlight Switch Oh 579

( Manufacturer Part Number: 2649678 ), ( Type: Headlamp Switch ), ( Side: Left )

Review PETERBILT Replaces 579 Headlight Switch Oh fits 2019

The **2019 Peterbilt Model 579 Headlight Switch (Part #2649678)** is a precision-engineered electrical component designed to seamlessly integrate with the advanced lighting systems of the iconic Peterbilt 579 semi-truck, a model renowned for its durability, performance, and cutting-edge trucking technology. This high-quality headlight switch is meticulously crafted to ensure reliable operation, offering truckers and fleet managers a dependable solution for controlling their vehicle s primary and auxiliary lighting functions with ease. Built to withstand the rigorous demands of commercial transportation, the switch features a robust, corrosion-resistant construction that guarantees longevity even in harsh environmental conditions, including extreme temperatures, moisture, and road debris. Its ergonomic design allows for intuitive operation, with clearly labeled controls for high beams, low beams, turn signals, and clearance lights, ensuring optimal visibility and safety on the road. The switch is engineered to meet or exceed OEM specifications, ensuring a perfect fit and seamless compatibility with the truck s existing electrical system, minimizing the risk of wiring conflicts or performance issues. Whether used in long-haul freight, regional hauling, or specialized transport applications, this headlight switch delivers consistent performance, reducing the likelihood of unexpected failures that could disrupt operations. For fleet owners and independent operators seeking a dependable upgrade or replacement part, the **2019 Peterbilt 579 Headlight Switch (2649678)** stands as a testament to Peterbilt s commitment to quality and reliability, providing peace of mind with every shift of the switch.

### **Pros and Cons of Buying a 2019 Peterbilt 579 Headlight Switch (Part #2649678)**

1. **Direct Fitment** This part is specifically designed for the 2019 Peterbilt Model 579, ensuring compatibility without modifications.

2. **OEM Quality** As an original equipment manufacturer (OEM) part, it meets Peterbilt s engineering standards, reducing the risk of premature failure.

3. **Reliability** Peterbilt is known for durable components, and this switch is likely built to withstand frequent use in commercial trucking applications.

4. **Ease of Installation** Since it s a direct replacement, installation should be straightforward for a qualified technician, reducing labor costs.

5. **Warranty Coverage** If purchased from an authorized dealer or distributor, it may come with a warranty, providing peace of mind against defects.

6. **Compatibility with Aftermarket Upgrades** If you plan to modify lighting systems (e.g., LED upgrades), this switch may integrate well with compatible aftermarket components.

7. **Reduced Downtime** A faulty headlight switch can cause operational delays; replacing it with a reliable part minimizes unexpected breakdowns.

1. **Cost** OEM parts can be more expensive than aftermarket alternatives, which may be a consideration for budget-conscious buyers.

2. **Limited Availability** Depending on the supplier, stock may be limited, potentially causing delays in receiving the part.

3. **Potential Overkill for Minor Issues** If the switch failure is due to a minor electrical issue (e.g., loose wiring), replacing the entire switch may be unnecessary if a simpler fix exists.

4. **Resale Value Impact** If you later sell the truck, some buyers may prefer aftermarket parts for cost savings, though this is subjective.

5. **Installation Complexity** While designed for easy replacement, wiring or connector issues could complicate installation if not handled carefully.

6. **No Customization Options** Unlike some aftermarket switches, this part does not offer additional features (e.g., programmable settings, remote controls).

7. **Potential for Counterfeit Parts** If purchasing from an untrusted source, there s a risk of receiving a fake or low-quality replica, which could fail prematurely.

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### **Conclusion**

The **2019 Peterbilt 579 Headlight Switch (Part #2649678)** is a solid OEM choice for restoring proper headlight functionality in your truck. Its direct fitment, reliability, and compatibility with the vehicle s systems make it a practical option for most operators. However, the higher cost and potential overkill for minor issues should be weighed against the benefits.

If your primary concern is **long-term durability and warranty protection**, the OEM part is the best choice. If **cost savings or additional features** are priorities, exploring high-quality aftermarket alternatives (e.g., from reputable brands like **Hella, Bosch, or Dorman**) may be worth considering though always ensure they meet Peterbilt s specifications.

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### **Recommendation**

- You value brand reliability and warranty coverage.

- The truck is still under warranty, and Peterbilt supports OEM replacements.

- You want a guaranteed fit without compatibility risks.

- You re on a tight budget and can verify the part s quality (e.g., from a trusted supplier like **RockAuto, PartsGeek, or a local truck parts store**).

- You re comfortable with installation and testing to ensure no electrical issues exist beyond the switch.

- Confirm the part number matches your exact vehicle year/model (2019 Peterbilt 579).

- Check for any existing wiring or connector issues that could cause recurring problems.

- If possible, compare prices from multiple suppliers (authorized dealers vs. online retailers).

For most professional truck operators, the **OEM switch is the safest and most reliable choice**, balancing performance with long-term dependability.

Details:

Timing belts, water pump, thermostat, fluids and seals are routine maintenance items should be replaced at the time of installation vehicle manufacturer?. If you are unsure ask. The vehicle is not serviced at proper intervals, or fuel/oil/coolant snot used in accordance with the manufacturers specifications. HD WARRANTY PERIOD: Limited Lifetime Warranty: Bar Plate Charge Air Cooler.

Complete Industrial or HD Radiator. Find new, reconditioned, rebuilt, and used semi-truck parts for Class 5 through Class 8. That are fresh, clean and approved by the vehicle manufacturer. It is highly recommended to use distilled water and it mandatory for all aluminum cooling components.

Our climate control line for industrial and heavy duty vehicles includes Radiators, Radiator Cores, Condensers Charge Air Coolers. Proper operation of the cooling and electrical system must be checked during the installation of products that can affected by those systems. Limited 24-Month Warranty: Plastic Aluminum Radiators - Aftermarket. The part is installed or operated in a vehicle outside of the United States Canada.

Excluding Bar Plate which carry a Limited Lifetime Warranty. Bumpers Peel Warranty. All external causes that can lead to electrolysis and/or corrosion must be verified and eliminated. Some states do not allow exclusion or limitation of incidental consequential damages, so the above may apply to you.

Failure is caused by abuse, misuse, or modifications. Refer to the vehicle manufacturers. Owners Manual for correct operation and maintenance schedule. The transmission fluid and filter are not replaced at time of installation with OEM recommended. Cooling system must be properly flushed and filled with new coolant mixture.

Warranty does not include cost associated with part removal, installation, inconvenience or consequential damages. Appropriate maintenance receipts required. Recommended Installation Procedures. Must be documented.

Or improper maintenance using the incorrect types and levels of fluids lubricants as outlined anther vehicles Owners Manual. Limited 12-Month Warranty: Bezels. To validate the above warranty coverage, following measures must be undertaken upon replacement of Complete Radiators, Radiator Cores and/or Charge Air Coolers. The installed heat tab is melted or removed.

Failure is caused by towing a trailer or other vehicle unless your equipped for this purpose as recommended the manufacturer. Limited 36-Month Warranty: Bolt-On Radiators. The part fails or becomes defective due to the vehicle being involved in a collision. Recommended service intervals.

Electrical,electronic, and/or mechanical devices, such as; thermostat, sensors, gauges,sending units, water pump and devices used to monitor maintain optimal engine temperature, must be verified for proper operation. Failure is caused by or related to a collision, fire, theft, vandalism,riot, explosion, lightning, earthquake, windstorm, hail, water, freezing flood.

specifications tusilap:

• for makes: Peterbilt
• for years: 2019
• mpn: 2649678
• type: Headlamp Switch
• side: Left

returns tusilap:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

payments tusilap:

• other
• credit card: Mastercard
• wallet: Paypal

seller tusilap:

• rating: 98.5%
• # reviews: 3371
• city: Toledo, OH

shipping tusilap:

• carrier: UPS
• cost: $0.00
• transit: 2-6 Days
• class: Standard
• type: Fixed
• service: UPS Ground

offer tusilap:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: May 27, 2026
• sold: 0

general tusilap:

• Commercial Truck Parts > Lighting > Other Lighting
• condition: Used

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