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Turn Signal Switch - Western Star 84401-3421

SKU VSM918Y116

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1 In Stock as of November 30, 2022 4:45 AM EST.

Replacement turn signal switch for Western Star trucks. 12 volt. OEM direct replacement for Western Star part number 84401-3421.

Product Specs for VSM 918Y116

  • Application:Western Star
  • Automann Number:577.96009
  • Paccar Number:TL1140
  • Western Star Number:84401-3421, 844013421
  • MPN: 918Y116
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VSM 918Y116 Details

Western Star Truck Replacement Turn Signal Switch

Replacement turn signal switch for Western Star 84401-3421

12V turn signal switch

  • Exceeds class A, SAE, QQC, and FMVSS108 specs
  • Heavy Duty unitized construction
  • Positive detent for better “driver feel” when signaling
  • Heavy Duty hazard tab for long life and reliability in 4-way flasher operation
  • Integrated stop lamp circuitry
  • Durable, long lasting contacts for longer life
  • Handle lift-to-dim high/low beam selector
  • Integral mounting bracket provides a sturdy assembly
  • Grease-free contact area
  • Optional mounting brackets to fit all steering columns

Customer Q&A - VSM 918Y116

Does this assembly have self canceling features ?

No, this does not have self cancelling features.

I have a 96 4964ex, is this a OEM replacement?

This is a direct OEM replacement for Wester Star part number 84401-3421. Turn Signal switches are sold by manufacturer part number and we would need that to cross to a replacement.


Vehicle Safety Manufacturing facilities are designed to produce high quality products in the most efficient & economical manner. By employing state of the art equipment, a top-notch engineering staff and a tough quality control department VSM is able to maintain this high level of quality.  VSM products are engineered and built to the most exacting of standards and meet or exceed all DOT and SAE requirements (when used as recommended.) VSM is the largest manufacturer of heavy-duty turn signal switches in North America, servicing both the OEM and replacement markets.

Vehicle Safety Manufacturing has, through products of highest quality and a complete dedication to automotive safety, earned an enviable reputation within the heavy duty industry.

Vehicle Safety Manufacturing Warranty

3 Year Limited Warranty

VSM warrants that all its products will be free from defects in material and workmanship for a period of 3 years.

What the Warranty does not cover

Damage from accidents, corrosion, improper installation, incorrect applications, overloading, and custom applications that are not specified under the OEM cross references. This warranty does not cover loss of freight, loss of profit, equipment, or personal downtime.

How to get service

If a VSM product failure results from a manufacturer defect, contact us at Michigan Truck Spring for support. You can contact us by phone at 1-800-358-4751 or by using our contact form.

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