Automotive Wiring Repair 101: Splicing, Soldering, and Shrink Wrap

Electrical gremlins are often caused by poor connections or damaged wires. Knowing how to repair a wire properly is a skill that will save you time and money.

The Right Way to Splice Wires

Avoid using cheap “scotch lock” connectors or twisting wires together with electrical tape. These methods invite corrosion and often fail due to vibration.

Soldering for Longevity

For a permanent fix, soldering is king. Strip the wire ends, twist them together (using a Western Union splice for strength), heat the wire with a soldering iron, and flow the solder into the joint.

Heat Shrink Tubing

Always slide a piece of heat shrink tubing over the wire before you solder. Once the joint cools, slide the tubing over the repair and heat it until it seals tight. For automotive use, adhesive-lined (marine grade) heat shrink is best as it seals out moisture.