Setup question Cobra 29 LTD Classic

Your best bet is to run it directly to your cigarette lighter.
Because God only knows what professional electrician was in there before you.

 

Is this a brand new radio?

 

Like NS10 asked it is a good point by asking if your the original owner?
If not that could be the issue either a CB shop that did something wrong or someone in there basement with a new set of tiny hand tools that needed to be opened.
Hope you get it figured out soon or if you have a CB shop close that you can trust let them look it over.

 

Years ago, my Cobra went dead. I took my multimeter and went through my rig it seemed like forever trying to find the problem. The problem was the radio itself. A few months later, and a new Cobra, my neighbor who tinkers with this stuff, found that my Cobra was spiked once too many times. How, I really don't know. The new 29 worked great. Still have it, and that's been years ago. So, your problem maybe is the radio itself. Suggestion: find a used radio, any radio, and hook it up. If that radio works, then it's your Cobra that's bad.

 

Ok good deal glad you got it figured out, process of elimination.