- Dec 9, 2012
Going back to my original question, once I got the DMM, I'm still a bit confused as to what I'm supposed to do. According to all the advice, it will have something to do with Ohm's. I understand that the sensible thing to do is to go and Google the answer like everyone else but I'm not even sure what to Google.
Most DMM's have a continuity mode. If you look on the dial selector there should be a symbol that looks like a little sound wave. Set the meter to that mode, then touch the leads together. The meter should make a noise letting you know that it has detected continuity.
Then, with your cable that has been cut, touch one lead to a spot on one of the connectors that goes into the IEM, and the other lead to one of the 8 cut cables. If it doesn't ring, switch the lead that's on the cut cables until you get a ring. Repeat this step 8 times until you identify each of the 8 cut cables. There should be 3 different "channels", a common ground that goes to both IEM's, a right channel that goes to the right IEM alone, and a left channel that goes to the left IEM alone. Once you identify what signal each wire is supposed to carry, you can terminate it to the 3.5mm jack accordingly. Because you have 8 wires, more than 1 wire will carry the same signal, so you can group them together.
If your DMM doesn't have a continuity mode, you can use the resistance mode (Ohm meter). The Ohm meter will display a small resistance when you find continuity, similar to when the meter would ring on continuity mode. However, this can be semi-unreliable depending on the situation.
Edit: To clarify, continuity in this case means able to complete a circuit - if you touch two conductors with the leads of the meter and the meter doesn't ring, then the two leads are not in contact with eachother, and the circuit is broken. (0 Ohms would show on an ohm meter)