Where does the pin on a mic go to on a cobra 29 ltd

That does not sound good at all.
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if you have another cobra mic that was previously used on a 29 it should fit . just about all 4 pin cobra mics are alike .You can even use them on Galaxy radios and others.

• Pin 1 = Shield = Shield
• Pin 2 = White = Audio
• Pin 3 = Red = Transmit
• Pin 4 = Blue = Receive

Regards, Tony

This is for a cobra CA50 mic
1-sheild
2-white
3-red
4-black

Use trial and error systemathically. If still refuses to work, mike and radio aren't compatibles.

Your mic or mic jack is faulty. Try a different mic. In cobra 29's and some other variants, when you disconnect the mic, the audio is disabled. It will still receive, and transmit(possibly) but you will hear nothing from the radio.

It could be,

• Broken wire on the back of the mic jack in the radio.
• Broken wire in the mic cord.
• Disconnected wires in the mic for the switch.
• Dirty mic connection pins.

Most likely the problem is with the mic, and not the radio.

It's the mic or radio like you said try this
unplug the mic the RX (receive) will stop
working there are 4 pins take a small screwdriver short one pin at a time to the
side of the plug an watch the meter if you
find one that makes the meter jump over
then your mic is bad.last if that don't work
then short 2 pins together and not to the side
of the plug. there is nothing that will hurt you
or the radio.hope this helps.I have worked
with radios and outher electronics for over
22 years. Good Luck

I suggest buying a 5 pin to 4 pin adapter. Ebay has them for $6. I would go chopping wires on the mic. Cobra 29 ltd is a nice radio. Have one myself.

1) violet 2) blue 3 ) shield 4) yellow 5) grnd Violet inside the mic is the power wire . Blue and yellow are the internal and external speakers. the other wires are to the antenna