
More questions? View all FAQs
The Custom Dynamics Smart Turn Signal Module TSM-4 is a direct plug-and-play replacement for OEM Harley-Davidson turn signal modules (68920-07 and HFSM 68924-07). This intelligent module modernizes your motorcycle's turn signal system while maintaining full OEM integration and safety features, including clutch interlock protection that prevents engine start in gear.
Engineered for versatility, the TSM-4 works seamlessly with both LED and incandescent bulbs without requiring additional load equalizers. It features intelligent turn signal cancellation based on speed, time, and direction, plus a four-way hazard mode with smart cancellation logic.
The module includes advanced safety features such as automatic shut-off when lean angle exceeds 45 degrees, built-in short circuit protection, and low-power consumption design for reliable operation across a wide voltage range.
Perfect for riders upgrading to LED lighting or maintaining stock incandescent systems, the TSM-4 combines modern electronics with robust construction. Installation is straightforward with included instructions, and the module follows OEM programming standards for hassle-free integration into your Harley-Davidson touring, trike, or Sportster platform.
The Custom Dynamics Smart Turn Signal Module TSM-4 is a direct plug-and-play replacement for OEM Harley-Davidson turn signal modules (68920-07 and HFSM 68924-07). This intelligent module modernizes your motorcycle's turn signal system while maintaining full OEM integration and safety features, including clutch interlock protection that prevents engine start in gear.
Engineered for versatility, the TSM-4 works seamlessly with both LED and incandescent bulbs without requiring additional load equalizers. It features intelligent turn signal cancellation based on speed, time, and direction, plus a four-way hazard mode with smart cancellation logic.
The module includes advanced safety features such as automatic shut-off when lean angle exceeds 45 degrees, built-in short circuit protection, and low-power consumption design for reliable operation across a wide voltage range.
Perfect for riders upgrading to LED lighting or maintaining stock incandescent systems, the TSM-4 combines modern electronics with robust construction. Installation is straightforward with included instructions, and the module follows OEM programming standards for hassle-free integration into your Harley-Davidson touring, trike, or Sportster platform.
Delivery time: 3–5 business days
Be the first to review this product