How to Repair Automotive Wiring

by Robert Moore

Automotive wiring can become damaged and will need to be repaired over the lifetime of a vehicle. You can repair wiring in multiple ways; however, automotive industry standards dictate the proper way to repair damaged wire is to solder the broken pieces together to create a strong bond that is equal to the strength of new wiring.

The battery is often located under the hood near the headlights.

Put on the safety glasses. Disconnect the positive and negative battery cables from the vehicle's battery using the socket and ratchet.


Place a piece of heat-shrink tubing over either side of the broken wire and slide as far away from the break as possible.

Wire strippers remove the protective coating from wires.

Trim back the remaining protective coating with the wire trimmers and provide about an inch of bare wire on each end of the break, then overlap and twist the wire together, creating a strong connection.

Soldering iron produces high heat at the tip.

Heat up the soldering iron and solder over the twisted wire. When done correctly the heat will cause the solder to wick into the wiring, creating a strong joint. Allow to cool and provide a gentle tug to the wire to ensure a good solder.

A heat gun is similar to a hair dryer.

Slide the heat-shrink tubing up and over the bare wire joint and use the heat gun to shrink the tubing, effectively creating an air-tight seal.

Items you will need

About the Author

Robert Moore started writing professionally in 2002. His career started has head writer and Web designer for VFW post 1224 in Hamburg, Michigan. He has prepared business plans, proposals and grant requests. Moore is a state of Michigan-certified mechanic and is pursuing an Associate of Arts in automotive technology from Lansing Community College.

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