Color code for 4-pin Cobra M75 CB Mic

This is the only resources out there that is remotely close.

https://www.wearecb.com/cb-microphone-wiring-page-2.html?selected_section=discussion

https://www.scribd.com/document/186885200/Mic-Wiring-Diagrams

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ALTAI PWR MIC - black/braid= earth, red=RX, white=TX, Yellow=MODASTATIC - blue/braid=earth, black=RX, red=TX, white=MOD, Yellow=Spare
SIRTEL ECHO MIC CBE 2002 - black/braid=earth, blue=TX, white=RX, red=MOD007 POWER MIC - brown/braid=earth, green=RX, white=TX, blue=MODSADELTA EC 980 - braid=earth, green=RX, brn=TX, white=MOD
or braid=earth, black=RX, blue=TX, white=MOD

1audio. 1red
2shield. 2shield
3receive. 3blue
4switching. 4white
5transmit. 5black

Hope this helps

it doesn't make a difference what color wire it is as long as the wire is connected to the function it is going to control If your mic has a red , blue , black , and shield wires but your radio isn't set that way you have to set it to the way your radio is . you have to find out where ground is then audio in and audio out then the last is the shield.

Here are the Pin outs for different mics that will work with your radio. If a wire is not listed then you cut it off. It's best to keep the wires as short as possible no longer than a half inch is suggested. Normally the Cobra pin out is standard for most radios.

Stock - 1- Shield (Ground) 2- Yellow (Audio) 3- Red (Transmit) 4- White (Receive)

Astatic - (4 wire) 1- Shield 2- White 3- Red 4- Black

Astatic - (6 wire) 1- Shield & Blue 2- White 3- Red 4- Black Yellow NC

Daiwa EM-500, Cobra, CA Series - 1- Shield & Black 2- Red 3- White 4- Blue

Galaxy DC-521S - (4 wire) 1- Shield 2- Yellow 3- Red 4- Black

Galaxy CB-660EI - 1- Shield & Black 2- White 3- Red 4- Blue

Sadelta - 1- Shield 2- White 3- Brown 4- Green

Turner - 1- Shield & Red 2- White 3- Blue 4- Black Yellow NC

Hello,
Here is the wire diagram for several common mics in relation to a 4 pin CB. Most recent 4 pin CB's such as Midland, Cobra, Connex, Uniden, etc can use 4 pin mics. The wiring is actually depending on the mic rather than the CB so long as the CB's are 4 pin as well. Once you go back to late 80's the 4 pin design was a little different. Anything new it is simpler.
Stock Mic 1- Shield (Ground) 2- Yellow (Audio) 3- Red (Transmit) 4- White (Receive)
Astatic - 4 wire 1- Shield 2- White 3- Red 4- Black
static - 6 wire 1- Shield & Blue 2- White 3- Red 4- Black Yellow NC

Daiwa EM-500 Cobra CA Series 1- Shield & Black 2- Red 3- White 4- Blue
Galaxy DC-521S - 4 wire 1- Shield 2- Yellow 3- Red 4- Black
Galaxy CB-660EI 1- Shield & Black 2- White 3- Red 4- Blue
Sadelta 1- Shield 2- White 3- Brown 4- Green
Turner RK56 Road King 1- Shield & Red 2- White 3- Blue 4- Black Yellow NC
Regards, Tony

Hello there
Here is the diagram for you
Cobra 29LTD, 29LTD ST, 29WX ST
Documentation Project
CBTricks.com
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29LTD ST Owners Manual
29WX ST Owners Manual
DIAGRAMS
29LTD ST Schematic Diagram
29LTD ST Schematic Diagram
29WX ST Schematic Diagram
WX Schematic Diagram
29LTD, 29LTD ST, 29WX ST Factory Service Manual
Page 1 to 11
Page 12 to 34
29LTD Factory Service Manual
29LTD
29LTD Schematic Diagram
29LTD Schematic Diagram
29 LTD Classic Schematic Diagram (Courtesy of Rick Jackson)



Mic Wiring
Stock
1- Shield
2- Audio
3- Transmit
4- Receive
Astatic (4 wire)
1- Shield
2- White
3- Red
4- Black

Astatic (6 wire)
1- Shield & Blue
2- White
3- Red
4- Black
Yellow NC
Daiwa EM-500
Cobra CA Series
1- Shield & Black
2- Red
3- White
4- Blue
Galaxy DC-521S (4 wire)
1- Shield
2- Yellow
3- Red
4- Black
Galaxy CB-660EI
1- Shield & Black
2- White
3- Red
4- Blue
Sadelta
1- Shield
2- White
3- Brown
4- Green
Turner
1- Shield & Red
2- White
3- Blue
4- Black
Yellow NC

Pin-1-Shield-Ground
2-Yellow-Audio
3-Red-TX

4-Black-RX
notes:The blue & white wire not used.

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

yellow is a dead wire don'r worry about it

red and sheid braided 1
white 2
blue 3

black 4
numbers by holes