How to connect the earphone cable if it is broken? Whether to weld with insulating tape or electric soldering iron. I see. Come on in.

You find the other end according to the color of the broken wire and burn the broken end with a lighter. The purpose is to burn the insulating glue, and then connect the wires of corresponding colors together, so that you can weld or wind them together. Then wrap the thread separately with ordinary tape. Because the voltage of the earphone is very low, insulating glue is not used. I hope you succeed!