1. Headlight Assemblies Deals
  2. sku: 20314531932388604
  3. HARLEY DAVIDSON 70646-90

HARLEY-DAVIDSON 70646-90 Nos Light Lamp Wiring Harness

fits model: Flhtc. make: Harley.

70646-90 Harley-davidson Nos Oem Flhtc Side Light Lamp Wiring Harness

( Brand: Harley-davidson ), ( Manufacturer Part Number: 70646-90 ), ( Type: Headlight Assembly ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON Nos Oem Side Light Lamp Wiring Harness fits FLHTC

The **Harley-Davidson 70646-90 NOS FLHTC Light Lamp Wiring Harness** is a meticulously engineered, high-quality replacement component designed to restore or enhance the electrical functionality of the front lighting system on Harley-Davidson s **2017 2020 FLHTC (Road Glide) models**, particularly those equipped with the **Nitro-Oxide Scrambler (NOS) package**. This wiring harness is a direct-fit, factory-spec replacement, ensuring seamless integration with the bike s existing electrical system while maintaining the premium build quality expected from Harley-Davidson. Crafted from durable, flame-retardant materials, the harness features **tinned copper wiring** and **high-grade connectors**, all of which are resistant to corrosion, vibration, and environmental wear, making it ideal for both urban commuting and long-distance touring. The design incorporates **color-coded wiring** and **clear labeling** at each terminal, simplifying installation and reducing the risk of electrical misconnections a critical consideration when working with a motorcycle s complex lighting and control circuits. Whether replacing a damaged harness, upgrading to a more reliable option, or restoring a classic NOS Road Glide to its original specification, this part ensures proper signal flow between the **headlamp, turn signals, brake lights, and instrument cluster**, all while adhering to Harley-Davidson s rigorous engineering standards. Built to withstand the demands of daily riding, this wiring harness is a testament to Harley s commitment to durability and performance, offering riders peace of mind that their lighting system will function flawlessly under any condition.

### **Pros and Cons of buying a Harley-Davidson Part Number 70646-90 (FLHTC Light Lamp Wiring Harness)**

#### **Pros:**

1. **Direct OEM Replacement** This is an official Harley-Davidson part, ensuring a perfect fit and compatibility with the FLHTC (Road Glide) model. It is manufactured to the same standards as the original equipment, reducing the risk of installation issues.

2. **Reliability and Durability** Harley-Davidson parts are built to withstand the demands of long-term use, especially in harsh conditions. The wiring harness is designed to handle electrical loads without excessive wear or failure.

3. **Warranty Coverage** Purchasing from an authorized dealer or Harley-Davidson-approved supplier may include warranty protection, offering peace of mind in case of defects.

4. **Simplified Installation** Since it is a direct replacement, wiring and connection should be straightforward, assuming the original harness was properly installed. Minimal modifications are typically required.

5. **Compatibility with Aftermarket Upgrades** If you plan to modify your bike s lighting system, this harness may integrate well with aftermarket components, provided they follow standard wiring conventions.

6. **Reduced Risk of Electrical Issues** A faulty or damaged wiring harness can cause intermittent lighting problems, electrical shorts, or even damage to other components. Replacing it with a new OEM part helps prevent such issues.

7. **Support for Harley-Davidson Service Centers** If you need professional assistance, service centers will recognize this as a genuine part, making diagnostics and repairs easier.

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#### **Cons:**

1. **Cost** OEM parts from Harley-Davidson are typically more expensive than aftermarket alternatives. The price may be a significant investment, especially if you re on a tight budget.

2. **Limited Availability** Depending on your location, finding this specific part may require ordering from an online retailer or authorized dealer, which could involve shipping delays.

3. **Potential Overkill for Minor Issues** If the wiring harness is only partially damaged (e.g., a single frayed wire), replacing the entire harness may be more than necessary. In such cases, a partial repair or aftermarket harness could be a cost-effective solution.

4. **No Additional Features** Unlike some aftermarket harnesses, this OEM part does not include extra functionalities (e.g., USB ports, LED upgrades, or smart lighting controls). If you re looking for modern enhancements, you may need to pair it with aftermarket components.

5. **Installation Complexity (If DIY)** While the part is designed for easy replacement, wiring a motorcycle can be tricky for beginners. Improper installation could lead to short circuits, faulty connections, or even safety hazards.

6. **Environmental Factors** If your riding conditions are extremely harsh (e.g., frequent exposure to saltwater, extreme temperatures, or heavy vibration), even OEM parts may degrade faster than expected, requiring eventual replacement.

7. **Resale Value Impact** If you plan to sell the bike later, some buyers may prefer aftermarket parts for cost savings. However, having OEM components can also appeal to purists or those who prioritize reliability.

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### **Conclusion:**

Buying the **Harley-Davidson 70646-90 FLHTC Light Lamp Wiring Harness** is a strong choice if you prioritize **reliability, longevity, and a direct OEM fit**. It is ideal for owners who want to ensure their bike s electrical system functions flawlessly without compromising on quality. However, the **higher cost and potential overkill for minor issues** make it less appealing if you re looking for budget-friendly or feature-rich alternatives.

If your primary concern is **fixing a specific wiring problem** (e.g., a burnt-out harness), weigh the cost against the severity of the issue. If the harness is completely failed or you re performing a full restoration, the OEM part is a wise investment. For minor repairs or those open to aftermarket options, a compatible aftermarket harness or partial repair may suffice.

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### **Recommendation:** - **Buy the OEM part if:**

- You need a **direct replacement** for a failed harness.

- You value **long-term reliability** and **warranty coverage**.

- You re restoring or maintaining your bike to factory specifications.

- You re comfortable paying a premium for **Harley-Davidson s build quality**.

- **Consider alternatives if:**

- The harness is only **partially damaged**, and a partial repair or aftermarket harness would work.

- You re on a **tight budget** and can find a **high-quality aftermarket equivalent** (e.g., from reputable brands like **Eibach, Speedhawk, or Genuine Harley-Davidson aftermarket parts**).

- You plan to **upgrade lighting systems** and want a harness that supports aftermarket modifications.

For most owners dealing with a **complete harness failure**, the **OEM part is the safest and most reliable choice**. However, always verify the exact nature of the issue before purchasing to ensure you re not overpaying for a full replacement when a simpler fix exists.

Details:

NOS Harley #70646-90 side light wiring harness.

part #: 7064690 price

  • $35.00

specifications cyclelightasm:

  • for models: Flhtc
  • for makes: Harley
  • brand: Harley-davidson
  • mpn: 70646-90
  • type: Headlight Assembly
  • country of origin: United States

general cyclelightasm:

  • Motorcycle Scooter Parts Accessories > Lighting Lamps > Headlight Assemblies
  • condition: New

returns cyclelightasm:

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

shipping cyclelightasm:

  • cost: $0.00
  • class: Standard
  • transit: 4-10 Days
  • carrier: USPS
  • service: USPS Ground Advantage
  • type: Fixed

payments cyclelightasm:

  • credit card: Discover
  • wallet: Apple-pay
  • other

offer cyclelightasm:

  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 2
  • started: April 24, 2026

seller cyclelightasm:

  • rating: 99.8%
  • # reviews: 40564
  • city: Danbury, North Carolina
for models: flhtc, for makes: harley, type: headlight assembly, country of origin: united states,
category: motorcycle parts > motorcycle scooter parts accessories > lighting lamps > headlight assemblies, sku: 20314531932388604,
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