I got tuned to what the meter says 1.0 ir very close to it, wood i be able to move it a little and see if the light goes off? It cant be internal because both radios were doin it and both are perfectly fine when i got them and gradually started to flicker, now stays on so yea
That antenna isn't shorting out at the mounting point, is it? Since you said truck, I'm guessing that this is a mobile install. Gee, I guess the model number of the Cobra tells me that too, duh. Anyway, is it possible that the hole you made on the vehicle, has come into contact on the sides of the hole? I had a ball and whip antenna mounted on a side panel, and when I first installed it, I was experiencing issues much as you have described.
I talked to a radio tech friend who suggested checking the install point, and verify that it wasn't shorting out to ground. Likely not your situation, but if it persists, it's something to check for.