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Wiring Up a CB

Discussion in 'Ham Radio - CB - Trail Communications' started by bmxking5, December 6, 2004.

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    1. bmxking5

      bmxking5 Well-Known Member

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      I have a Cobra CB that's installed but just needs to be wired up. This is the first thing I have ever done with wiring, so I don't know all that much about it, but I know that installing a CB is about as easy as it gets. I do know that I need to wire it into something that only works when the key is on. When I was searching, I found that some run the power to the battery while others wire into the cig. lighter. Which is better? Any tips/help about wiring this up is greatly appreciated. TIY
       
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    3. casketboy75

      casketboy75 New Member

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      run your hot wire straight to the battery, just be sure you have an in line fuse, everybody i know of wires them to the battery because u can cut the cb on and off when you want to and then you dont have to have the key turnt, and just find a good spot to ground the ground wire on and thats it, I wouldnt do it in the ciggarette lighter even though u can take it out whenever very easily you will hear the motor running with it like that through the CB and when u roll the windows up or down youll hear it through the CB gets annoying. hope this helps Trevor
       
    4. Chew_12

      Chew_12 Working

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      When I installed mine(im not a electrical person either) i took my multimeter and tested the box above(it has a lot of connection things) the emergency brake. I looked for one that was 12 v. Just run your red wire to that and the black to the frame or some other metal.
       
    5. Crankcase

      Crankcase Moderator Emeritus Moderator Emeritus

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      You want the C.B. to ONLY operate when the vehicle is on? You need switched power or a realy for that. Runnign straight to the battery will mean it will have constant power, and you will have to turn it off manually.

      The direct power sytem is better in the fact that in an emergency situation where you do not have the keys handy, the CB will still work.
       
    6. bmxking5

      bmxking5 Well-Known Member

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      Thanks for the help guys. So I guess I'll run it straight to the battery instead of the cig. lighter.
       
    7. DeRocha

      DeRocha NEX Vice President Elite Explorer Moderator Emeritus

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      How many wires come out of the CB? My cobra has 3; Power, ground, and Acc. You can wire the power wire to any 12v source, but wiring the power directly to the battery with inline fuse will help cut down on any electrical noise that it could pick up if wired in the cabin. The Acc wire gets wired to an accessory wire that recieves 12v when the key is on. This allows the CB to auto power on/off with the ignition key (prevents battery drain). If you want the CB to function without the key then wire this into any 12v source.
       
    8. bmxking5

      bmxking5 Well-Known Member

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      I have 2 wires(power and ground)
       
    9. glfredrick

      glfredrick Well-Known Member

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      I always wire my CB and stereo system to a hot wire that is always on. I don't want to have to have the key bonging away when I'm sittig around the truck working or something.

      A CB doesn't draw much in the way of juice - I have left mine on for days at a time with no problem... On the trail, I leave it on all the time - even when we are parked to chit chat...

      Make sure that your antenna is grounded well. That can be a problem on some trucks. If you are unsure, they sell a special antenna that has a ground wire (good for hooking to fiberglass, etc.).
       
    10. appx91

      appx91 Active Member

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      I wire alot of things like stero's and things such as that .... I jus use the cig, lighter as my power and everything seems to work fine and then jsut make sure you ground it off.
       
    11. big351bronc

      big351bronc Active Member

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      I dont know if youve wired it up already, but I just tapped mine into a fuse that is on when the ignition is off. I think the accessory fuse. Then just grounded it out to a piece of metal underneath the dash. I get a little bit of interference, but nothing thats too bad.
       
    12. bmxking5

      bmxking5 Well-Known Member

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      Thanks for the info everybody. No I haven't wired it up yet, it will probably be some time this weekend though, hopefully.
       
    13. bmxking5

      bmxking5 Well-Known Member

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      Thanks again everybody for the help, I got it all wired up tonight. I have one problem though. I plugged in the PA speaker into the PA hole in the back of the CB. I flipped the switch in the front to go from CB to PA and with those two things done, the speaker acts as an ext. speaker instead, even though it isn't plugged into the ext. speaker hole in the rear. Nothing comes out of the CB speaker and I can hear everyone talking through the PA speaker, when it is on PA. Has anyone else had this problem? I don't know why this is happening. If anyone has any info about fixing this problem, it would be greatly appreciated. Thanks

      BTW-If what I am saying doesn't make any sense, let me know and I'll try to reword it.
       
    14. bmxking5

      bmxking5 Well-Known Member

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      bump
       
    15. Crankcase

      Crankcase Moderator Emeritus Moderator Emeritus

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      Don't know how I missed your current problem.....But I know the answer to it LOL.

      The Cobra CB is kind of cool in the fact that the PA speaker acts as a CB PA speaker as well. The "external speaker" jack is for INSIDE use.

      So, because of the dual action, the volume control of the PA speaker is the "Dynamike" knob. Turn it up to control the PA speaker volume. Turn the "Squelch" UP to cancel the C.B. when talking in the PA mode. You can hear the C.B. source cut out.
       
    16. bmxking5

      bmxking5 Well-Known Member

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      OK, Hopefully when I get home I'll be able to mount it. Thanks Crankcase :)
       
    17. bmxking5

      bmxking5 Well-Known Member

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      Thanks again Crank, I got it to work right. Just needs to be louder. :D

      Right when I thought I'd be able to mount it, I can't find a place to run the wire from the engine compartment to the CB inside the truck. I checked every opening I saw, but I can't find one that has enough from to push the wire through. Does anyone have a suggestion of where I can run the PA speaker wire to the inside. Thanks

      EDIT: I will drill my own hole only if I have to, I am just afraid that wires might be behind where I'd drill. That is just the last resort.
       
    18. bmxking5

      bmxking5 Well-Known Member

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      Nevermind about the post above^^^^. I did some more searching and found a post from 2000 :eek:, and
      So now all I've got to do is mount it. Thanks everybody for the help

      EDIT-Everything is finally installed and works great. Thanks :)
       
      Last edited: December 16, 2004
    19. Paraphoe

      Paraphoe Go big or go home Elite Explorer

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      I have a quick question too - I have the Wilson Lil Wil - does the magnetic antenna need a ground?
       
    20. rizzjc

      rizzjc Scubajoe - Radio Mod Staff Member Moderator Elite Explorer

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      No.
       
    21. Paraphoe

      Paraphoe Go big or go home Elite Explorer

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      Thanks rizz, you rock. How did you guys run the coax into the cab? Any pictures of it going through the weatherproofing as some of you have said you did?
       
    22. rizzjc

      rizzjc Scubajoe - Radio Mod Staff Member Moderator Elite Explorer

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      Probably best to start a new thread on this, instead of hijacking this old one - you'll get more views, but I didn't have to run my antenna through the firewall, as I use a glass mount ham radio antenna, so everything stays inside, other than the power and ground to the battery, which I ran through the hood release cable grommet.
       
    23. Paraphoe

      Paraphoe Go big or go home Elite Explorer

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      I'll give that a shot.
       
    24. fulfilledstraw

      fulfilledstraw New Member

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      Wire gauge and fuse amperage?

      I have a Cobra 29LTD Classic. I want to run power directly from the battery, but I don't know what wire gauge to use. Additionally, what amperage rating should I use for the in-line fuse? Having little experience with wiring, I am at a loss. Any help would be appreciated.
       
    25. jpettid2011

      jpettid2011 New Member

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      i got a Cora Cb 19x and it has no wires. in the back there are 3 spokes and above each one (from left to right) it says 13 8V DC how to i hotwire it
       
    26. DeRocha

      DeRocha NEX Vice President Elite Explorer Moderator Emeritus

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      Is this your CB? Generally it should have pins for power(+) Ground (-) and maybe accessary (+) to automatically turn the unit off/on with the ignition.
      [​IMG]
       

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