Off course before you read any further, make sure the problem is the cable, not your Iphone and not the usb port. If you do not know how to do this, here is an instruction:
Try to charge your Iphone with the cable and several differed usb ports. When your Iphone does not charge with any usb port, the problem could be located in the cable or in your Iphone (assuming not all usb ports are broken). Now try charging your Iphone with an other cable. If this does work, the problem is indeed located in the cable.
Step 1: Stuff You'll Need
- soldering iron
- some solder
- thin piece of metal
- utility knife
- small screwdriver
- small pliers
Depending on where the problem is located, you might be needing some wire.
Step 2: Locating the Problem
To know which of the four wires is not fully connected, you'll need to use an ohmmeter. When you look inside the Iphone part of the charging cable, you could see four connection points. One in the center and three at the left. The one in the center is ground (-). The other three are 5V (+), data+ and data-. Inside the usb you'll see also four connection points. From left to right these are ground (-), data+, data- and 5V (+).
5V is the wire through which the electricity will flow to your Iphone, ground is the way back.
You now take a little piece of metal and place it against all connection points in the Iphone part. Place one side of the ohmmeter against the piece of metal. The other side of the ohmmeter needs to be put to one of the connection points of the usb. If the ohmmeter does not give a reaction, you know this wire is broke. In the case of my brothers charging cable, ground was not connected, the others were. The ALL need to be connected to make the cable do its work!
Now you know which wire is broke, you still need to know if the problem is located in the cable, in the usb or in the Iphone part. This part is a bit tricky. You need to make a small incision in the wire. The best place to do so is close to the Iphone part. Look at the picture to see the exact location. Only cut through the white plastic! Do not cut any wires! Inside you'll see four wires: one grey, one green, one white and one red. The grey one is ground, the green one is data+, the white one is data- and the red one is 5V. Now make a small incision in the plastic around the broken wire. Do NOT cut any coper wire! Next you'll need your ohmmeter again. Place one side of the ohmmeter against the coper wire of the wire you did just cut. The other side of the ohmmeter needs to be placed against the the usb connection point of the broken wire. If the ohmmeter gives a reaction, you know the problem is at the Iphone part's side of the place you just cut. If so, skip to step 5. If not, the problem is located somewhere between the usb connection point and the place you just cut the wire. In my case, the problem was located at the Iphone part's side. Always keep in mind it is possible there is more then one problem!
When the problem is located at the usb/wire side of the cut, you'll have to cut again. This time close to the usb part. Check the picture for the best place to cut. Now place one side of the ohmmeter to the coper wire in the first cut, and the other side to the second cut. If the ohmmeter gives a reaction, you know the problem is in the usb part. If so, skip to step 4. If not, the problem is located inside the wire.
No you know where the problem is located, so lets solve the problem.
Step 3: Repairing the Wire
I know this is not the most beautiful way of repairing a wire, but is is the most easy way. To make it look a bit nicer, you could choose a role of tape with a fun colour and tape the whole wire. This will also give the wire extra strength and a nice, personal colour.
Step 4: Repairing the Usb Part
Step 5: Repairing the Iphone Part
Step 6: Congratulations
Plus, I thought it was pretty interesting to see how this Iphone charging part of the cable looked at the inside.