Moderator: JR Moderator
The audio wire is always wrapped in the shield (bare wire), EASY, we've already figured out 2 of the wires.
Finding the Transmit lead:
With your ohm meter check the 3 remaining wires, check 2 wires at a time until you get continuity. The remaining wire you aren't testing is your transmit lead.
Finding the Common and Receive:
Now you must key the mic, press the PTT button in and hold it, a rubber band works, or have someone hold it for you. Check for continuity between the Transmit wire and the two unidentified wires one at a time, whichever wire reads continuity with the TX wire is the Common lead, the other wire is Receive
if the mic has 5 wires, but the connector only has 4 pins!! In this case solder the common and shield wires to the same pin on the mic
hopefully this will help some people.
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The best thing to do in that situation is to look up a schematic of the radio and go from there. Most radios are listed in CB Tricks or covered by this chart,ejk wrote:How about a situation where I have a radio without a mic, how can I figure out the configuration then?
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(Nothing new in this post, just said in a different way.)
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You can run the PTT from the handlebars and then the mic from the helmet into the same mic plug with no issues, but you'll need to run the external speaker wire up to meet the mic wire in front. I would wire them into an 1/8" stereo plug so you can disconnect the helmet with ease.