gauges all over the place when I key up mic

Installed my stock cobra 29 in my peterbilt last week (while I was waiting on my Galaxy to be tuned). Noticed when I key up the mic my rpm and speedo bounce all over the place which cause the loss of traction light to come on. Using a wilson 2000 mirror mount as far away from the cab as possible. I was going to run a ground to the antenna until I found that the bars that hold the mirror have a factory ground wire running to them. I installed my Galaxy the other day and it is doing the same thing except now the abs warning comes on as well. I cannot go to crazy to remedy this issue because it is a company truck so doing any major rewiring would be out of the question

Is this caused by something in the power wires feeding the radio? Or something to do with the coaxal? The coaxal is ran thru the ceiling above the dash (same place the factory had ran the original coaxal) and there is a whole mess of other wires (not related to the CB). The radios both transmitted and received fine the only issues that are present are directly related to the trucks gauges.

Would running the coaxal between the windshield and dash (to get away from the whole mess of wires in the ceiling) stop this from happening?

The most important question of all. Can this interference cause any damage to the truck? Or cause an important system in the truck to shut down while driving which would be a major safety issue for me and everyone else on the road?

 

Thanks. The Galaxy has duel mosfets and is tuned up. I was gonna go with the rfx 75 upgrade as well but don't need that much power. The problem was happening as well with my stock cobra when I had it in there. It looks like the factory ground is directly tied in next to the fuse box on the drivers side so that could be a small part of the problem but it appears I narrowed down the problem.
I ran my coax (decent stuff not some thin radio shack junk) were the factory coax was ran thru the headliner (there is a whole mess of wires up there around my coax and it runs right next to my fuse box in front of the drivers door). Today I ran a separate coax out of my door to the antenna on the mirror and there was no gauge interference. So I will be relocating my antenna to the passenger side mirror. And see how that works. I hope I can run it thru the factory location thru the headliner cause I like it to look clean and not have wires all over the place. I hope since there are not really any wires up there on the pass side and no fuse box the problem will go away

 

It's a 2011 386. The coax is good quality coax I just ran it thru the stock location (i know better than using a good radio and decent antenna with junk coax.) Which happens to run right next to the fuse panel and thru the headliner er with a whole mess of other wires all around the coax But I figured I would give the factory ground a try. I did isolate it so I am going to try and relocate the antenna to the pass side. I will be running a new ground (figured I would give the factory ground a shot but since it is grounded basicly at the fuse panel I will def. Be running a new 1