So make sure you buy them of good quality and always pull the wires to check if they are properly attached. In principle, these tubes provide a good and safe connection, but we also regularly see that the solder does not flow and stick properly. This way, you have a rock-solid and moisture-free connection. During heating, the casing shrinks along with glue on the inside. They have used tin with a relatively low melting temperature. In the special soldering tube the tin flows as soon as you heat it with for example a hot air drier. There is also no soldering tin in these tubes. That is not the case with these soldering tubes. The only difference is that you need a crimping tool for the tube above. You put the wires you want to connect into these, just like with the connecting pipe above. Add heatshrink for strength.Ī good alternative to soldering with a soldering iron is to use tin-filled soldering tubes. Replace these contacts because sooner or later they will cause problems. You can see this clearly on the photo below at the blue wire. Sometimes the cable shoe is only attached with a few copper wires. You will need the right tools for this.Īnother known problem is that where the wire is clamped in the connector, the wire is damaged. If possible, you can also replace the terminal lugs completely. Contact spray also has a preventive effect against the formation of corrosion. You can do this with a (tooth) brush or cloth and some brake cleaner, for example. Thoroughly clean the plugs with the cable lugs in them.
That gives resistance which impedes the current. Check that the contact points are not dirty, greasy or green due to oxidation, as you can see in the photo below with the red plug. This is often the case with headlight wiring, because it has to conduct a relatively large and long lasting current.įor the proper functioning of all your electrical components in your car, it is important to check the plugs. The copper of such a wiring harness from a BMW usually has a very nice copper colour after 10 years, while that of a cheaper car with thin wires has discoloured black. BMW hardly ever used thin wires, while in cheaper cars you will find plenty of thin ones. If you run a wire with too much current for a long time, the insulation can even melt away.Īgain, there is a big difference in quality. This can be easily recognised by the dark discolouration of the copper. The extra resistance causes more heat and therefore more wear. Because the specific resistance increases, the wear and tear process will also increase faster and faster.
Every time this heating up and cooling down of the copper occurs it causes an increase of the specific resistance of the copper core. When a large current runs through a relatively thin wire for a long time, the copper will heat up. Wiring harness wear due to internal influencesĪlso from the inside of your electrical wiring there is wear and tear.
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