- Installation Video: How To Install ProBEAM Solid Amber 1157 Bullet LED Turn Signals for Harley Davidson Motorcycles September 15, 2020 13:37 Updated How To Install ProBEAM Solid Amber 1157 Bullet LED Turn Signals for Harley Davidson Motorcycles Related articles - Installation Video: How To Install ProBEAM Amber/White LED Front Turn Signals for Indian Motorcycles - Installation Video: NEW Custom Dynamics PROBEAM Front Bullet Bezel LED Turn Signals Install And Comparison - Installation Video: How To Install ProBEAM Rear Red Ring 1157 LED Turn Signals by Custom Dynamics - Troubleshooting: 1157 Turn Signals Tech Bulletin