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Ground wires 94 w900l 3406c cat ,seem to have a ground problem found 3 ground wires so far is there a main ground that in missing ,buzz sound thru cb radio when i turn on headlight switch ,anysugestions

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  • Mitchell Cathey
    Mitchell Cathey May 11, 2010

    Can you describe the location of the wires you did manage to find?

    Also, with the sound, does the buzz noise happen while the radio is off? Does it happen if the key is not in the ignition when turning on the headlights?

    -Mitchell

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6 Suggested Answers

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Communicomm
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SOURCE: wiring a midland 78/999 cb radio microphone

Pin 1 = white
Pin 2 = shield
Pin 3 = black
Pin 4 = red

Posted on Sep 29, 2008

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Shuttle83
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SOURCE: TRC520 CB wont power up

Hello, First of all you only have the Power wire Red, and the ground wire Black to connect for 12v DC to power the unit. If you memory power it is usually connected to a constant power source such as the cigarette lighter or continuous 12V dc powersupply off of the battery. These are the only connections that should be connected to provide power. Since the unit will not turn on I suspect that the CB's power supply and regulator have been blown. Another possible choice is that the radio was working and someone removed the antenna cable and the the RF power amplifier malfunctioned taking the power supply and regulator with it. To solve this problem, check the voltages on the wires before connecting them to the radio (these should be the 12 volt power off of the radio circuit, and the 12 volt power off of the continuous 12V connector (or the cigarette lighter). These voltages should read 12V. Connect the CB with it turned off and measure the voltages (should be 12V) Turn the radio on and check the voltages (should be a little less than 12V) If the radio does not come on then the internal power supply of the radio might be defective (In this case I would advise taking the CB to a qualified radio repair shop) I hope this helps Thank you, Shuttle83 http://www.electron-age-technologies-llc.com

Posted on Jun 11, 2009

tbirdfan1
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SOURCE: With my CB I am getting feedback through the am fm radio speakers

Hello there:
the shielded coax rgu-45 series is probably the best one for this application also if you run the radio to a different fuse or u can also get a surpression filter that goes on the coax line I own a WL9000 KW. i had the same problem untill i got the filter installed at a loves truck stop in texas and no more problems since ok?
drive safe and best regards mike (warner transp.)

Posted on Aug 17, 2009

SOURCE: Wiring Johnson Microphone to cobra 29 CB Radio

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

Posted on Nov 23, 2009

  • 29 Answers

SOURCE: On a Maxon MCB-30 cb radio, there are three wires.

Hello stud

The orange wire is for memory retention for the last channel you were on if the red wire loses power as in switched on and off with the car ignition just hook up the orange to a 12 volt source that is on all the time. By the way those are some neat little radios wish I had one.

Ray

Posted on Aug 23, 2010

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