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LED Spare Electronic System Parts Head Lamp WG9719720002 for Sinotruk HOWO 371 Truck

The WG9719720002 is the Right-Side (Passenger Side) Front Headlight Assembly designed specifically for China National Heavy Duty Truck Group (SINOTRUK) heavy-duty trucks, primarily used on the HOWO 7 Series and 2008–2020 model years. This is an OEM-standard combination headlamp integrating high beam, low beam, position light, and turn signal into one durable housing.
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  • WG9719720002

  • Sinotruk HOWO

Attribute Specification
Part Name Right Front Headlight Assembly / Combination Head Lamp
OEM Part Number WG9719720002
Side Right-hand side (passenger side) — NOT interchangeable with left
Voltage Rating 24V DC (standard for Chinese commercial vehicles)
Some aftermarket versions support dual-voltage (12V/24V)
Lamp Functions Integrated
• High Beam
• Low Beam
• Parking / Position Light
• Turn Signal (Amber)
Bulb Type (Original Equipment) Halogen bulbs
• Low Beam: H7 55W
• High Beam: H1 70W or H7 60W (varies by batch)
• Turn Signal: PY21W
Optical Design Reflector-type (non-projector), with precision vacuum-metallized aluminum reflector bowl
Lens Material High-transparency polycarbonate (PC) with anti-UV coating to prevent yellowing
Housing Material Flame-retardant ABS or PP plastic — impact-resistant and thermally stable
Sealing System Rubber gasket + quick-release rear cover; IP65 rated (dust-tight, protected against water jets)
Mounting Type Three-point bracket mounting (screws into radiator support frame)
Connector Type Standard 3–5 pin OEM plug (compatible with HOWO wiring harness)
Weight Approx. 1.3 kg – 1.6 kg
Certifications CCC (China Compulsory Certification), ISO9001, GB/T 26572 (automotive lighting standards)
前照灯-2

Name1

前照灯-5

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Installation Instructions

Proper installation ensures correct beam aim, waterproof integrity, and electrical reliability.

✅ Pre-Installation Checks

  1. Power Off: Disconnect battery negative terminal to avoid short circuits.

  2. Remove Obstructions: Open grille or remove front panel if necessary for access.

  3. Inspect Mounting Frame: Ensure brackets are not bent or corroded.

  4. Check New Unit: Verify lens clarity, seal condition, and bulb presence.

✅ Installation Steps

  1. Unplug old headlight’s electrical connector carefully.

  2. Remove three mounting screws securing the headlight.

  3. Gently pull out the assembly from the front frame.

  4. Insert the new WG9719720002 into position — align with mounting holes.

  5. Secure with original or new stainless steel screws (torque: ~5–7 Nm).

  6. Reconnect the multi-pin plug firmly until it clicks.

  7. Close any removed panels and reconnect battery.

❗ Critical Step – Perform Headlight Alignment

Post-Installation: Beam Adjustment

  • Use the adjustment screw(s) located on the back of the headlamp.

  • Park vehicle on level ground, 5–10 meters from a wall.

  • Adjust vertical aim so that:

    • Low beam cutoff line is slightly downward (to avoid blinding oncoming traffic)

    • Left and right beams are at same height

  • Optional: Use professional headlight alignment machine for precision.


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