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Author Topic: CB making the speedometer go crazy  (Read 1312 times)

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Offline aka-justin

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CB making the speedometer go crazy
« on: March 17, 2013, 09:28:06 AM »
I finally used that CB I bought months ago on my last trip a week ago. I noticed about 50% of the time I keyed up, the speedometer went coo coo - jumping all over. At one point, it jumped to the govenor speed making the whole thing buck.

Anyone seen this or do I need to sh17 can this radio? I'm using a small speedometer recalibrator by the PCM, but the CB and antenna wire are no where near.
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[1995 YJ 2.5L with 4" lift on 31" KM2 - Sold] 1995yj
[2003 TJ Rubicon 4.0L with 4" lift on 35" Wrangler M/T - Sold]
To be continued...
--Justin

Offline Jeffy

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Re: CB making the speedometer go crazy
« Reply #1 on: March 17, 2013, 11:52:34 AM »
Strange,  maybe it's (RF) leaking into the calibrator.  I'd try shielding it (calibrator).
« Last Edit: March 17, 2013, 02:22:18 PM by Jeffy »
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Offline sharpxmen

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Re: CB making the speedometer go crazy
« Reply #2 on: March 17, 2013, 12:09:40 PM »
do you have the solenoids on the + wires to the CB. Soulds like it's sending HF thru the +12v somehow, could be that it has an internal problem.
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Offline aw12345

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Re: CB making the speedometer go crazy
« Reply #3 on: March 17, 2013, 02:19:20 PM »
Wouldn't hurt to moive the wiring from the CB as far away as you can from anything speedo related and make sure the CB and the CB antenna have a good ground
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Offline neale_rs

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Re: CB making the speedometer go crazy
« Reply #4 on: March 17, 2013, 02:55:36 PM »
Suspect a voltage problem.  The gauges go crazy in my 2003 Neon whenever the battery is starting to go bad.
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Offline aka-justin

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Re: CB making the speedometer go crazy
« Reply #5 on: March 17, 2013, 09:46:59 PM »
Everything is seperate from the speedo recalibrator and the CB except the ground. I'll isolate the ground for the CB and try shielding the recalibrator if not - it'd be easy to.



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[1995 YJ 2.5L with 4" lift on 31" KM2 - Sold] 1995yj
[2003 TJ Rubicon 4.0L with 4" lift on 35" Wrangler M/T - Sold]
To be continued...
--Justin
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