Loose connections: Loose or corroded electrical connections can also cause light and blinker issues. Check the connections at the battery, the light and blinker switches, and the light and blinker assemblies. Ensure all connections are clean and tight.
Faulty switch: A faulty light or blinker switch can also be the culprit. Try operating the light and blinker switches multiple times to see if the lights or blinkers start working again. If not, you may need to replace the switches.
Broken wire: A broken or damaged wire can also cause lights or blinkers to malfunction. Inspect the wires around the battery, light and blinker switches, and light and blinker assemblies. Look for any signs of damage or fraying. If you find a broken wire, you will need to repair or replace it.
Control Module: The control module or relay is responsible for controlling the lights and indicators. If it fails, the lights and blinkers will not function. You will need to test the control module using a multimeter or replace it if necessary.
Ground Issue: Check for a poor or no ground connection. Ensure the battery is securely mounted and that all connections to the frame and engine are clean and secure.
If none of the solutions mentioned above resolve the issue, the problem may be more complex and require professional diagnosis and repair. In such cases, it's best to take your motorcycle to a trusted mechanic or mechanic specialized in Harley-Davidson motorcycles for further inspection.
