Step 1 · Check All Connections
Inspect whether the power line and ACC line are securely connected, and confirm that every extension cable connector is fully locked in place.
Step 2 · Substitute Components in Sequence
Replace the spotlight, controller, button switch, extension cable, and power line one at a time to identify which component is causing the issue.
Step 3 · Swap Left and Right Sides
Swap the left and right spotlights, and swap the spotlight extension cable connectors at the controller end. Observe whether the problem follows the swapped component.