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Old 08-02-2013, 07:24 PM   #1
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Cb stopped working

So my cb was all hooked up and worked. Hadn't swr'd it yet but could still hear others chatter. Now it doesn't work at all. I checked the connections and they're good. Any ideas? Red wire is on the positive pole of the battery and black is going to a ground screw on the underside of the hood.

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Old 08-02-2013, 07:31 PM   #2
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No power or No chatter?

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Old 08-02-2013, 07:46 PM   #3
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No power
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Old 08-02-2013, 08:02 PM   #4
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Check the ground again. Common problem. Try jumpering another pos and neg to c if the unit is still ok maybe.
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Old 08-02-2013, 09:10 PM   #5
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I would try the ground on negative battery terminal. If that doesn't help check if there is a fuse.
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Old 08-02-2013, 09:54 PM   #6
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cb stopped working

Have you cked the fuses?
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Old 08-02-2013, 10:41 PM   #7
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Haven't checked fuses. Could be a fuse even when wired directly to the battery?
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Old 08-02-2013, 10:59 PM   #8
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Quote:
Originally Posted by Aseventyfive View Post
Haven't checked fuses. Could be a fuse even when wired directly to the battery?
Should be a fuse regardless of where it's wired...
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Old 08-02-2013, 11:02 PM   #9
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Copy. Will check and get back to you.
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Old 08-03-2013, 08:41 AM   #10
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Quote:
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Haven't checked fuses. Could be a fuse even when wired directly to the battery?
If this is wired directly positive to battery, the line needs a fuse. Seriously. Within 2' or so of the battery connection.

To your OP, as others have said look into the ground and (hopefully) fuse(s). I bet that local ground is no good, though.

Test lights/DMMs can be very helpful here. Test for power @ radio, then ground; that'll tell you if it is wiring side or radio side.
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Old 08-03-2013, 10:15 AM   #11
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Which fuse would it be?
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Old 08-03-2013, 10:30 AM   #12
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The fuse in the radio's positive wrie. Usuall a white or black plastic capsule looking thing.

Unless you cut it off when installing.
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Old 08-03-2013, 10:36 AM   #13
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As sparky said, there will be an inline fuse from the cb on the pos. wire.
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Old 08-03-2013, 10:48 AM   #14
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Completely forgot about the inline fuse. That's exactly what the issue was.
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Old 08-03-2013, 11:27 AM   #15
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Old 08-03-2013, 01:10 PM   #16
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You up and running again?

Glad it was an easy one.
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Old 08-03-2013, 01:16 PM   #17
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Not completely. The fuse is parted inside. I still have to buy the replacement and PMT it.
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Old 08-03-2013, 07:53 PM   #18
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I replaced the fuse and now I have power but I can only hear a weird buzzing noise when it's powered on.
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Old 08-03-2013, 07:56 PM   #19
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I just used it to test it out and it blew the fuse again.
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Old 08-03-2013, 09:54 PM   #20
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I assume you have an antenna attached. Was it a 1 or 2 amp fuse? I would remove the mike from the unit then turn it on. Just to make sure you don't have high SWR and a stuck mike button. Is there a chance the antenna could be open or shorted?
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Old 08-04-2013, 12:05 AM   #21
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Quote:
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I assume you have an antenna attached. Was it a 1 or 2 amp fuse? I would remove the mike from the unit then turn it on. Just to make sure you don't have high SWR and a stuck mike button. Is there a chance the antenna could be open or shorted?
Antenna is attached. It was attached initially when the radio was working/picking up chatter. 2 amp fuse. I don't have an swr meter yet so I can't check for high or low.
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Old 08-04-2013, 12:06 AM   #22
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Old 08-05-2013, 09:17 AM   #23
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When does the fuse blow? When you turn on the radio, during receive, when you try and transmit.

How is your antenna cable. Did it get crushed or damaged. Is the antenna fully attached, all coection points clean.

Any changes between when it was working and now?
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Old 08-05-2013, 10:00 AM   #24
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It blew after transmitting. Checked the antenna cable and the in tire length looks good.
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Old 08-05-2013, 10:11 AM   #25
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Old 08-05-2013, 02:00 PM   #26
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I'm wondering if swr was way high since you heard chatter but blew fuse. Did that fuse blow the first time when you started transmitting? Then after you replaced fuse only buz no static or chatter when you adjust squelch. If you transmit with very high swr you can damage the final output transistor. Are you using a mag mount antenna? Or self mounted installation? CBs are low power but they still need reasonable matched swr. I prefer to use an antenna bridge prior to connecting the transmitter. I'm sure I am too far away to be of any help.
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Old 08-06-2013, 11:05 AM   #27
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I never had a swr meter to check. I ordered one though. I do know that on e I hooked it you was surprised that I could hear others. I never checked if they could hear me but would mess around keying up the mic. I never had any issues and all of a sudden the fuse blew. So I replaced the fuse and turned the radio on. It would only make a dull buzzing sound. At that point I tried transmitting a couple of times but go nothing and then the fuse blew the second time.
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Old 08-06-2013, 07:43 PM   #28
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What type of antenna are you using? Is it mounted on metal. The quarter wave antennas require a ground plane. Some half wave antennas do not require a ground plane. Of course when I say half wave the more modern antennas are coiled to get the half wave configuration or quarter wave configuration. Not many people running around with quarter wave 9 ft whips anymore.

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Old 08-06-2013, 09:18 PM   #29
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I'm using a firestik II 4' tunable tip antenna, with a firestik mounting stud, and a terraflex tail light mount which I ground the paint off of as well as the body of the jeep to have metal to metal ground.
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Old 08-06-2013, 10:06 PM   #30
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Do you have an ohm meter? ! Walmart has a vom for about $17. Harbor freight has them for about $6. The firestick mount I see a pictur of is black. Is that a paint coating on it? With your antenna cable disconnected from the CB unit end and that end of the cable not touching anything and hanging loose measure the resistance at the antenna end (by your tail light) outside of coax to a good ground on the vehicle. You should have zero ohms. Then measure the resistance at the CB end of the coax. Between ground and center conducter. Should be an open circuit i.e. not shorted. If that bracket has a powder coating on it and not electrically conductive through the paint (appears black in the picture I saw) it would be why the CB worked and why the fuse blew when you transmitted. The CB would receive but if not grounded the SWR would be real high.

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