Electrical issue

Oh and yes, I just signed up with the Cummins Quickserve about a month ago and totally forgot about it. Might have been able to find this issue faster. Thanks for reminding me about it.

 

Ok seems my issue might be back. I just cannot figure this out. Any advice would be appreciated before I go insane. So here it is. I went out for a haul with a fellow driver. He seemed to read me on my cb just fine when we were real close leaving the factory where we had loaded our mobile homes to transport. When we got onto the road I heard him just fine on my radio but he evidently did not hear me. After about 15 minutes he called my cell phone and said he hears me but he cannot understand what I am saying. And I think I mentioned in an earlier post that sometimes when I key up my CB my regular radio seems to go whacky. It will change from the tuner over to the USB or another mode. Just recently I ran a brand new power wire so the CB had its own dedicated power wire. Still the same thing. The batteries are only about a year old. 4 of them. I have had 3 different alternators on there. I have replaced most of the ground wires and made sure they were all cleaned. Just today after I started the truck it showed only 12.4 at the alternator. I turned on all the lights to put a load on the system and still the same. Then rev'd the engine up 2 times real quick and came back now to find 14.4 at alt. I just cannot figure out what is going on here. Does the starter have something to do with this issue? I tried to trace the wires from the alt over and thought they went over to the starter but had problems matching up the wires. We are getting a snow storm here now in Jersey, but as soon as it clears I guess I will have to do a continuity test to trace them. Anyone have any ideas what the heck could be going on here? I need to get this issue fixed when I can.