If you are considering installing a car stereo into your car its very important that you insulate the wires to prevent them coming in contact with each other. If this does occur, it can possibly blow the fuse in your car stereo or create further damage to the vehicles internal electrical system. This is something that you want to avoid at all costs so its best to cover the exposed copper strands of the wire. Now there are also sorts of methods that you can use to get the job done. You have the choice to use PVC electrical tape, however it can look messy and unprofessional. The best method that we use to protect the wires when our car audio technicans install a car stereo into a vehicle is using heat shrink. This is a small plastic tubing that shrinks when heat is applied providing a tight secure fit over the wires that need covering. They come in all sorts of colors, the most ideal size for most car audio installations is 3/16 shrink ratio. The best recommend company that we always used in our trade is by 3M cheap junk from Ebay is a no no.
The best method is to twist, solder and heat shrink the connections for a proper long lasting install. You will need a portable source of heat to tighten the shrink wrap. You can use anything from a cig lighter or a girls hair dryer. But the best tool to get the job done the most effective way is to use a heat gun, as it will take less time for it to shrink around wires of the car stereo.
1) Slide over heat shrink tubing across the wire you want to cover.
2) Make the connections with the other wire by unstriping the insulation off both ends and twisting them together tightly.
3) Get a low powered soldering iron that is made for electrical wires and solder the connections to ensure that it doesn't come undone from any movements. This can happen when you push back all the wires into the din slot when finishing off.
4) Now that you have soldered the connection, slide the heat shrink tubing upwards until it covers that area where you can see the two wires being connected. So that you are covering up any bits of naked wires.
5) Get a heat gun or a similar relevant source of heat and apply it around for 3-5 seconds. Stop as soon as you notice that the heat shrink has tightly fitted onto the wire.
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