How To Solder Car Wires Together

Hold them end-to-end with their bare copper ends crossing at a slight angle.

How to solder car wires together. Use nothing but 60-40 rosin-core solder intended for electrical wiring. When done properly you have a strong conductive connection that turns two separate wires into one. The other safe connection option is the crimp connector being simple and easy to use they are popular however dont always offer the longevity of soldering.

Now take these two wires and place them together in an X with the ends of the insulation in the centre of the X. If the wire is stranded twist the strands together with your fingers. Heres the right way to do it.

For tools Matt uses his trusty auto-stripper and an affordable soldering iron. A pig-tail where the wires are bent at a 90-degree angle to the rest of the wire is NOT a suitable connection and will cause problems dont do it. When your soldering iron is all prepped and ready to go its time to solder the wires.

The wires can then be situated together by further twisting them blending them end to end or wrapping one around the other for a splice. I will be using a power probe butane soldering gun. The most secure and durable way to splice two wires together is to solder them.

You melt the solder onto the wires to stick them together and as the solder cools it forms a permanent bond. Once coated sufficiently move the shrink tube and heat it so it makes a snug fit around the wire. For this example we solder the same two 18 AWG wires together end to end.

Keep the iron in place and touch the solder to the wire until its fully coated. Use nothing but 60-40 rosin-core solder intended for electrical wiring. The process of soldering is taking two or more wires and joining them together and then using heat to melt electrical solder connecting those two wires permanently.