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Why does my cobra cb radio reset my dash lights and trigger the washer blades and kil

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Old 06-03-2014, 09:18 AM
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Originally Posted by arjeeper
Are you running the handheld through the same coax and antenna or just using the built-in antenna on the handheld?
I have a firestik 3' antenna the that I use.

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Old 06-03-2014, 09:29 AM
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Originally Posted by matrix311
I have a firestik 3' antenna the that I use. Sent from my SCH-I535 using Tapatalk
Ok. But you're saying you're using the same coax run, routed similarly, and the same antenna for both radios.

That would lead us to the antenna system (the coax, mount, and antenna) as the area of concern for the interference.

I think the advice given will get you there:

-route the coax through alternate paths.

-try to move the radio box (where the coax connects) to another location

- try one or more large mix 31 or 43 ferrites on the coax

The last option is really more of a last resort and frankly should be needed with 4 watts of AM power.

Last edited by arjeeper; 06-03-2014 at 09:31 AM.
Old 06-03-2014, 09:31 AM
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*shouldn't be needed.
Old 06-03-2014, 09:40 AM
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Originally Posted by arjeeper
Ok. But you're saying you're using the same coax run, routed similarly, and the same antenna for both radios.

That would lead us to the antenna system (the coax, mount, and antenna) as the area of concern for the interference.

I think the advice given will get you there:

-route the coax through alternate paths.

-try to move the radio box (where the coax connects) to another location

- try one or more large mix 31 or 43 ferrites on the coax

The last option is really more of a last resort and frankly should be needed with 4 watts of AM power.
My other jeep is a yj so totally different from how the jk is. I just tried parts from both rigs for testing purposes.

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Old 06-03-2014, 09:41 AM
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Originally Posted by arjeeper
Are you running the handheld through the same coax and antenna or just using the built-in antenna on the handheld?
Originally Posted by matrix311
I have a firestik 3' antenna the that I use.

Sent from my SCH-I535 using Tapatalk
OK so now I'm confused. The cobra 75 wx st. Does have a built in antenna it is a compact mobile unit. Is this what u have?
Old 06-03-2014, 09:44 AM
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Originally Posted by Rbzak
OK so now I'm confused. The cobra 75 wx st. Does have a built in antenna it is a compact mobile unit. Is this what u have?
Yes this is the model I have. It's not a portable handheld. It requires to be hard wired to the battery for power and the junction box in the photo has a coax input for external antenna which is required.

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Old 06-03-2014, 09:49 AM
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Originally Posted by matrix311
Yes this is the model I have. It's not a portable handheld. It requires to be hard wired to the battery for power and the junction box in the photo has a coax input for external antenna which is required.

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That's what I thought I have the same one in my 08 jku.
Old 06-03-2014, 09:54 AM
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Either way, still try the above suggestions.
Old 06-03-2014, 11:22 AM
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Where are you guys running the power from the CB into the engine bay at? Which Grommet? I have mine passenger side high side and the power leads come in right by the battery

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Old 06-03-2014, 12:12 PM
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The power to my 65w VHF ham radio (don't have a CB) is on the passenger side, fed through a crack accessible when the good is open and the interior side dash panel is popped off. Didn't even use a engine bay grommet for it.

That said, yours sounds fine.


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