08 EVO 883xl sporster, purchased this used bike, turn signals would not work TSM was bad. Found the correct TSM and dealer programed it. The sinals I took off were 3.8v led. Replace LEDs with standard 12v incandescent OEM. Turn signal indicators on the dash work. Signals are only getting 8v of power. I believe something was installed to cut power back the voltage for the 3.8v led lights. Now it’s driving me Waco.