Weird CB problems 2022 Kenworth T680

Okay very good. I suppose it could be the coax, I'm not really sure it is. I'm just basing it on the fact that if you remove the coax from a 4 watt CB radio and key the mic, the needle swings toward on the meter. I would think no coax attached would be worse than bad coax, and yet the needle moves.
I'm leaning towards a power issue possiblity. That Mirage is a very nice looking radio. I'm not sure the exact power it puts out. One website says 40 watts, another claims 60 watts. At any rate the power cables needs to be run to the batteries, with fuses installed close to the battery terminals for safety. That's the best way for a high power radio. If new coax and mounts don't fix it, I would probably call the CB shop back and let them know. Please let us know what you figured out the problem is.

 

Great job on narrowing the problem down. Almost sounds like there's some kind of magnet installed inside the cubby hole. That would probably effect the meter, kind of like static from a dry carpet. Yes I'm grasping at straws here. Ha.

 

Okay, I doubt it would be the magnet in the external speaker, since the radio internal speaker has a magnet too. At least that would seem logical. After thinking about it, I suppose the speaker wires shorting as you push the radio into the cubby hole could possibly effect the meter. There's a detection diode in the meters circuit and with a bad external speaker, it could make this diode (diode 5 in a cobra 29) turn off the current to the meter because the external speaker jack is in this same audio path.
The quickest way to test this theory would be to leave the external speaker unplugged and insert radio into the cubby again. If it works then you have the answer to the problem. I imagine you've probably already tried this.

 

Oh yes it will...

 

Beauty of a tool...

 

How?

 

Lol to be honest..Im not even sure why i said that...Musta been a major brain fart...