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Car Radio The radio cuts out if the volume is too high, or if I start using other electrical items in the car (electric windows, indicators, lights etc). Also there is an "AF" sign flashing on the radio You guys obviously don't offer support for free, so whats the catch? Tks sean Car radio is ecq mosfet 50 wx4 pioneer

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Re: Car Radio

The FixYa site is all supported by volunteers answering the questions.

We are paid for the more technical problems, or people who want Immediate answers.

It sounds like the Stereo may have been wired to the car incorrectly.

If you have the model number, you can find the Users Manual on to check the wiring connections.

Best of Luck.

Posted on Nov 14, 2007

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1 Answer

Why did the head lights go out on my elantra and the speedometer stop working

You have stray RF getting into your electrical system. If you are using a radio, try grounding the
radio chassis and the antenna better. It may not help and the vehicle's electrical system my just be volnerable to radio frequency (RF) interference.

Feb 07, 2011 | Directed Electronics CB Radios

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Light went out inside meter how do i replace bulb

you'll have to open the radio up..and please make sure its not pluged in..find the old light in the side of the meter,carefully pull it out and cut the if you're using a white light you can just connect it but if you're using a color light you'll have to find out what side is positve and negitive then connect it ,use heat sink or electric tape.

Dec 03, 2009 | Connex 3300 240-Channels Base CB Radio

2 Answers

Used the CAL function for the SWR. When I transmit, the Ant. light comes on and the meter is above 3. Do I need to shorten my antenae?

not necessarily. it may be electrically short. if the swr is higher on channel one than it is on channel fourty, your antenna is electrically short. if the swr is higher on channel fourty than it is on channel one, your antenna is electrically long. no matter what anyone says, all antennas are tunable. just cut the shielding back at the top of the antenna and adjust if necessary. if it is a steel whip, it should have a set screw at the bottom. if you still have problems with high swr, ground the mount to your vehicle. if you still have high swr, you might have to try a non ground plane antenna.

Sep 13, 2009 | Cobra 29 LTD CB Radio

1 Answer

CB Base Station picking up electrical interference

i dont know what AC DC adator your using. you should look into a 12V power supply. or plugging that into a RF canceling power strip, like a monster power strip. TV's that are on or other appliances may cause high noise levels on the CB, make sure your coax is good, your antennas good, and all jumpers are good. its hard to tell with out looking at it, but do a quick once over of the system.... you are using a base antenna right? if not you need to create radials for a mobile you plan on using for a base.

Make sure the connectors on the coax are all on right, this causes problems a lot of the time. sometimes even brand new coax have bad connectors installed.

Jan 02, 2009 | Cobra 29 LTD CB Radio

3 Answers

Catching about 3 pounds of noise!

Good Evening,
I would think the noise you are picking up is atmospheric noise ( space noise as some of them call it ) or also known as sun spot noise ( skip ). Since we are in a downward skip pattern with the sun spots the atmosperic niose remains a bit higher than we may like. When the niose comes in, it appears as a static niose, so if this is the niose you are experiancing, I assume this should quiet a bit as time goes along for the next few years. ( until skip conditions start on an upswing again ) This happens in a cycle every 7 to 11 years on a normal basis. One thing you can do is purchase a noise chopper devise. They sell for between 20 and 30 dollars and can be switched to a low chop ( filter ) or a high chop ( filter ). You need to know that if you use one of these devises to illimenate noise, it that you also illimanate signal. ( you receive less ). I hope in some way this answer has helped. If I can be of any more assistance, please feel free to email me at this address or a personal email at or call my shop at 307-266-4675, Mod- Fri 9AM-3PM.
Ed ( Radio Man)
NC Electronics
Mills Wyoming

Apr 19, 2008 | Radio Shack TRC-447 CB Radio

1 Answer

Electrical feedback

phone knights 01652 648 378,its a common fault

Mar 10, 2008 | Magnum S9 Base CB Radio

1 Answer

Keys up and everything dims and does not transmit.

Moving the volume/on/off knob to make the radio work again is interesting and a good clue. On most CB's, the pot is probably soldered directly to the printed ciruit board.

It's possible that there is a bad solder joint to the power connections on the pot that turn the radio on & off. If the solder joint is bad, it can still make a connection but the connection will have added resistance in line. The on/off switch can be bad too.
Switches arc each time they are used and over time, the contacts become pitted and make poor connection.

I had a stereo receiver where the tuner lights flickered and there was electrical noise in the receiver. It turned out to be a bad on/off switch.

This resistance may be low enough not to affect the radio when in the receive mode but when you transmit and draw more current that resistance will be noticable during transmit.

The fact that you rotate or move the volume/on/off knob and the radio starts working again, tells me that there may be a bad connection in the radio.

A cheap thing you can try is spraying some electrical contact cleaner into the pot and rotate the pot back & forth several times and turn the switch on & off several times to clean it.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim

Feb 08, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Rear tail lights on BMW 525i.


Your post/description:
1. "...can apply slight pressure...connector...come back on...: indicates a loose connection or probably corroded terminals. The easy way is to spray it with electrical contact cleaner. The preferred method is to disconnect connector and with a thin sharp object scrape the pins (both male & female). An indicator of corrosion is dull greenish/grayish discoloration of the terminals. At times when the color is brown indicates probability of high current or loose connection. Same cleaning would and should rectify. On some instances, the female connector might be loose where the male will no longer contact tightly. Applying a slight squeeze with a pliers should tighten it up a bit making the joint firm and solid. Of course, safe practice should be exercised and verify the ign/acc is off before doing any electrical work. Please make sure that you don't remove your battery terminals since most current models of car radio units will go into protective/lock mode when battery is disengaged.

2. "...short in the wiring..." beg to disagree. If it were a short, a fuse will blow and it will not light up even intermittently.

Hope this be of some help/idea. Pls post back how things turned up or should you need further information.

Good luck and kind regards.

Nov 14, 2007 | CB Radios

2 Answers

Antenna light still on

The antenna warning light on the Cobra 29 LTD has a pot ( varabile resistor ) that sets the senativity of the light coming on. If you open the radio, you'le see the pot at the back of the radio. It's the last pot in the rear of the chassis Simply turn it more torward the center of the setting ( anyplace is ok as it means nothing to the preformance of the radio ). The light won't come on unless the SWR's are high. Good Luck and if I can help more, you can email me at this address or at my email address
NC Electronic
Mills, Wyoming

Oct 31, 2007 | Cobra 29 LTD CB Radio

3 Answers


Checking and setting the swr can only be accomplished with an inline swr meter, not with the radios swr cal switch and the radios meter. Once you have set the swr of the antenna, you cal the radios meter to reflect the actual swr reading and use it like a dummy light on a car, just as an indicator of high swrs. To set your swr:

You must have an inline swr meter, which can be purchased online or from a truck stop. The ones at truck stops are cheap ones, but will do the trick for the most part.

You connect your antenna 18ft coax to the antenna plug of the swr meter, and a jumper coax (any length) to the transmitter plug of the swr meter and then to the radio.

Close all doors and make sure no one is messing around with the vehicle or antenna. You must be set up as you would normally be transmitting.

Now set your cb radio to channel 40 and your swr meter to fwd. Key up your microphone1.gif and at the same time turn the set knob on the swr meter until the needle is at the line that reads set. Unkey your mic and set the the swr meter to ref. Key up again and note what your reading is. Now leave the swr meter in ref and turn the cb to channel 1. Key up and take your reading. If the reading on ch 1 is higher than ch 40 you must raise the stinger on your antenna. If ch 1 is lower than 40, you lower your stinger. You are trying to get lower than a reading of 3 and as close to 1.5 as possible. If you lower your stinger as far into the antenna as it will go and you need it shorter, you cut the bottom of your stinger no more than 1/2" at a time, and recheck your swr reading after each cut.

Once you have gotten the best reading you can, connect your antenna directly back to the radio.

The setting of your swrs is to make your antenna as efficient as possible, by trying to get it as close as you can to a 50ohm impedance. THE ONLY PART OF YOUR SYSTEM THAT CAN CHANGE YOUR SWR IS YOUR ANTENNA, not your coax and not your radio. Your radio and coax can give you false readings, but only the antenna can actually change the swr.

On the swr meter, the fwd/ref switch stands for forward (power that is being transmitted out) and reflected (power that is reflected back into the radio.

Just for information sake, the swr cal switch on your radio is used to set the meter to reflect the swr that your antenna is set at. The meter on your radio is like a dummy light on your car. ONCE AGAIN, YOU CAN NOT SET YOUR SWR ON YOUR RADIO, only the antenna.

Rollin CBs
Mt. Vernon, TX

Aug 23, 2007 | Cobra 29 LTD CB Radio

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