Turn Signal Isolator Universal by Custom Dynamics

$26.95 USD
Normally ships in 2-3 business days



In stock and ready for shipping


  • Completely Isolates Turn Signals From Motorcycle
  • Provides Outputs For Aftermarket Turn Signals
  • Works With Led Or Incandescent Bulbs
  • Max Load Of 4 Amps Per Side
  • Built-In Short Circuit Protection
  • Built-In Thermal Protection
  • 4 Way Hazard Compatible


Custom Dynamics® Turn Signal Isolator (TSI) electronically isolates all turn signal outputs from the vehicle allowing for the use of almost any aftermarket turn signal. Using the TSI, the additional turn signal load is placed entirely on an auxiliary power source and does not affect current draw on the motorcycle’s turn signal circuit.

There are no relays or other mechanical devices that are subject to mechanical failure.  A short circuit on any accessory connected to the TSI outputs will have no impact on the vehicle preventing damage from non-compliant aftermarket accessories, diagnostic trouble codes, and to help protect factory warranty. 

The TSI is a hardwire installation on any motorcycle and is recommended for use any aftermarket turn signal such as Custom Dynamics® Plasma Rods™ or LED License Plate Frames including LED or incandescent bulb products.

Use Posi-Tap™ and Posi-Lock® connectors (sold separately) for a hassle free installation. Custom Dynamics® recommends the installation of an in-line fuse  when power is being accessed from the positive battery terminal.

Alternatively, use Custom Dynamics® Dynamic Load Isolator (DLI) for a completely plug and play solution to isolate all outputs from the vehicle.

Note: Additional CanBus Adapter (1 per turn signal) or Signal Stabilizer™ (1 per bike) may be required when stock turn signals are removed for custom applications. Sold separately. 

Click HERE for Instructions

Fitment Disclosure

This fitment information is provided to you based on the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and other important application information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the information provided.

General Safety Warning

Failure to follow manufacturer's recommendations and requirements can cause product failure resulting in serious injury or death. While effort has been taken in collecting accurate fitment information, Witchdoctors Billet Specialties LLC accepts no liability for loss or damage resulting from errors or omissions. If you believe any of the information provided is erroneous, please email: Fitment@buywitchdoctors.com


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Doesn't fit or just not happy with it? You can return any new, unopened, unused or unaltered item within 30 business days of delivery receipt of your item. We will issue a refund to your original payment method.

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Product Style Sku Stock
Default TitleCD-TS-ISO17